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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:34:07
isnt it just y?
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:34:23
im stuck at the part finding the mean
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:38:21
where does it ask for the mean?
0
1
220,517,274,845,577,200
ramonov
0921
ℝamonov
false
205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:38:47
to find z, i need to find the mean
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:39:09
there are 4 parts here
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:39:13
none of them have z, nor need z
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:39:57
z is the z-table for the probability of the normal distribution
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:40:08
i am supposed to use it to find the probability
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:41:29
i know z-tables. i also know none of the 4 questions in your image require z-tables
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:41:40
oh really
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:41:41
which part are you stuck on
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:42:01
if it doesnt require z, then im not sure how to do it
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:42:22
you're given the exact values of the probability mass function, so `P(X=a) = f(a)`
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:42:51
so a would just be 2/8%?
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:43:29
2/8 is already the answer, you don't need %
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:43:56
"probability" is a number between 0 and 1, inclusive
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:44:34
oh i got it, so since x=11 i can get the answer but what do i do with the ones that is less than or greater than
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:44:57
Can you explain in words what `P(X < a)` means?
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:45:23
probability of x less that is less than a
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:46:44
look at your table for values of x less than a
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:50:32
oh so i add the f(x) from 7 to 9? if it's less than 9?
1
0
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:51:30
correct
0
1
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205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
261,933,205,387,477,000
riemann
02/03/2022 14:52:00
$P(X < a) = \sum_{x < a} f(x)$
0
1
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null
205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
510,789,298,321,096,700
TeXit
02/03/2022 14:52:03
**riemann**
https://cdn.discordapp.c…205387477002.png
261933205387477002.png
0
1
null
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null
null
null
205,872
help-1
dde2ece08f3c442cbc8e27ea116709cb
326,803,048,041,283,600
nhat
02/03/2022 14:52:13
thank you very much
1
0
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:12:25
https://cdn.discordapp.c…6426/unknown.png
unknown.png
1
0
null
null
null
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:12:55
how is it possible that the interval of convergence has $\leq$ sign if the ratio test checks for $<1$?
1
0
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
510,789,298,321,096,700
TeXit
02/03/2022 15:12:58
**Erzis エルジス**
https://cdn.discordapp.c…859515973632.png
284065859515973632.png
0
1
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:13:22
https://cdn.discordapp.c…7545/unknown.png
unknown.png
1
0
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:13:26
my calculations if that's any helpful
1
0
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null
null
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
140,928,979,849,838,600
Plurmorant
02/03/2022 15:13:58
that's true, I guess you have to use other methods to check the end points
0
1
null
null
null
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
140,928,979,849,838,600
Plurmorant
02/03/2022 15:14:15
if you plug in -12 and -8 you'll get simple summations you should know the convergence of
0
1
null
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null
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:14:36
so everyone is wrong here?
1
0
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
140,928,979,849,838,600
Plurmorant
02/03/2022 15:14:42
:stare:
0
1
null
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null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:14:43
it only says $\leq$ for -12
1
0
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
510,789,298,321,096,700
TeXit
02/03/2022 15:14:45
**Erzis エルジス**
https://cdn.discordapp.c…859515973632.png
284065859515973632.png
0
1
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
706,934,233,012,371,600
Ansh_
02/03/2022 15:16:03
hmmm
0
1
null
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null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:16:09
that's exactly what I did
1
0
null
null
null
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
140,928,979,849,838,600
Plurmorant
02/03/2022 15:16:48
just plug -12 and -8 in
0
1
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
140,928,979,849,838,600
Plurmorant
02/03/2022 15:16:59
not to your work but just to the original problem
0
1
null
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null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
706,934,233,012,371,600
Ansh_
02/03/2022 15:17:36
hmm
0
1
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:17:44
dude stop posting latex version of my calculations, what's the point?
1
0
null
null
null
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:18:00
I appreciate the effort but I don't see the reason
1
0
null
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null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:18:16
thanks, I guess it's mandatory to do it every time then
1
0
null
null
null
null
null
205,873
help-1
4a87d2e9d65c4f0f83f6330c0708a593
284,065,859,515,973,630
Erzis
02/03/2022 15:18:18
.close
1
0
null
null
null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
706,934,233,012,371,600
Ansh_
02/03/2022 15:20:10
: shrug :
https://cdn.discordapp.c…d283a50a2cbc.jpg
Screenshot_2022-02-04-01-49-46-85_e4424258c8b8649f6e67d283a50a2cbc.jpg
1
0
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:27:50
Need help with Khan academy, I keep getting ((2x^2 - 6x)/(3x^2-9x)) Basically I've been flipping the bottom fraction and multiplying it with the numerator, haven't done algebra in like 17 years so not sure what I'm doing wrong
https://cdn.discordapp.c…khan_academy.jpg
khan_academy.jpg
0
1
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null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
485,903,210,272,391,200
dldh06
02/03/2022 15:29:06
Post work
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:30:57
https://cdn.discordapp.c…20203_143048.jpg
20220203_143048.jpg
0
1
null
null
null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:31:24
ok so simplify
0
1
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null
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:31:39
2x-6/3x-9
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:31:42
what polynomial do the numerator and denominator have in common
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:31:57
ok so simplify further
0
1
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:33:22
and if u cant see the polynomial, the other thing u can do is factor out the largest integer from each
0
1
null
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null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:33:30
how can u factorize 2x-6?
0
1
null
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null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:33:39
what is in common between 2x and 6
0
1
null
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null
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:33:44
two
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:33:51
so u have 2(x-3)
0
1
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null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:33:59
do the same to the denominator
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:34:05
3x-9 =
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:34:21
3(x-3)
0
1
null
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null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:34:34
2(x-3)/3(x-3) =
0
1
null
null
null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
523,545,618,459,787,300
zed
02/03/2022 15:34:58
yoo, this is meant to lead to a discord invite? help pls
https://cdn.discordapp.c…rgGrWYAQmF4B.png
FKsrgGrWYAQmF4B.png
0
1
null
null
null
null
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205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:35:45
but that factor isn't any of the answers so I'm not sure where to go from here
0
1
null
null
null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:35:53
(sorry for dum)
0
1
null
null
null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
485,903,210,272,391,200
dldh06
02/03/2022 15:36:26
$$\frac{2(x-3)}{3(x-3)}$$
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
510,789,298,321,096,700
TeXit
02/03/2022 15:36:29
**dldh06**
https://cdn.discordapp.c…210272391178.png
485903210272391178.png
0
1
null
null
null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
485,903,210,272,391,200
dldh06
02/03/2022 15:36:35
You can cancel stuff out
0
1
null
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null
null
null
205,874
help-1
e11049b11178460b9172c4c102652ddb
205,143,587,749,494,800
MattDog_222
02/03/2022 15:37:04
(with the exceptions for x != 0 and x != 3 as stated in the original problem)
0
1
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null
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null
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:37:05
oh I did the factoring wrong lol, I wrote (x-2)/(x-3)
0
1
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null
null
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205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:37:26
https://cdn.discordapp.c…4109952/welp.png
welp.png
0
1
456,226,577,798,135,800
Deleted User
0000
Deleted User
false
205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:37:29
thx!
0
1
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null
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205,874
help-1
e11049b11178460b9172c4c102652ddb
276,193,639,313,440,770
Tommy
02/03/2022 15:37:54
.close
0
1
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null
null
null
null
205,875
help-1
02e5891a2d464c9ebecbf1bbdd25ed9e
722,398,964,053,442,600
Proelectro
12/24/2021 08:52:40
https://media.discordapp…11224-WA0006.jpg
1
0
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null
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205,875
help-1
02e5891a2d464c9ebecbf1bbdd25ed9e
722,398,964,053,442,600
Proelectro
12/24/2021 08:58:34
.close
1
0
null
null
null
null
null
205,876
help-1
e90a46b1dfce45acab2df9cdbcd1081d
456,226,577,798,135,800
Deleted User
02/03/2022 15:42:14
How do I solve this?
https://cdn.discordapp.c…4511/unknown.png
unknown.png
1
0
null
null
null
null
null
205,876
help-1
e90a46b1dfce45acab2df9cdbcd1081d
200,013,547,491,688,450
a disappointing son
02/03/2022 15:44:01
inverse trig
0
1
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205,876
help-1
e90a46b1dfce45acab2df9cdbcd1081d
456,226,577,798,135,800
Deleted User
02/03/2022 15:44:32
so I just tan-1 (1.15) ?
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0
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205,876
help-1
e90a46b1dfce45acab2df9cdbcd1081d
200,013,547,491,688,450
a disappointing son
02/03/2022 15:44:37
mhm
0
1
null
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205,876
help-1
e90a46b1dfce45acab2df9cdbcd1081d
456,226,577,798,135,800
Deleted User
02/03/2022 15:44:40
ok thanks!
1
0
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205,876
help-1
e90a46b1dfce45acab2df9cdbcd1081d
456,226,577,798,135,800
Deleted User
02/03/2022 15:44:41
.close
1
0
null
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205,877
help-1
70bff34eb9db4a3f9c71e910a6ad8bef
438,347,116,570,476,540
skyio
02/03/2022 16:15:44
https://cdn.discordapp.c…524/problem1.png
problem1.png
1
0
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205,877
help-1
70bff34eb9db4a3f9c71e910a6ad8bef
438,347,116,570,476,540
skyio
02/03/2022 16:17:34
How would I go about solving problems like this?
1
0
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null
205,877
help-1
70bff34eb9db4a3f9c71e910a6ad8bef
321,445,119,171,756,000
Shuri2060
02/03/2022 16:18:51
It is asking about existence of root. Sounds like you need some theorem
0
1
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205,877
help-1
70bff34eb9db4a3f9c71e910a6ad8bef
321,445,119,171,756,000
Shuri2060
02/03/2022 16:18:56
(but there are some other things to check)
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1
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help-1
70bff34eb9db4a3f9c71e910a6ad8bef
438,347,116,570,476,540
skyio
02/03/2022 16:19:12
im just lost as to how i should even go about doing anything in regards to this type of problem
1
0
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205,877
help-1
70bff34eb9db4a3f9c71e910a6ad8bef
321,445,119,171,756,000
Shuri2060
02/03/2022 16:21:59
Intermediate Value Theorem might help, no?
0
1
null
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205,877
help-1
70bff34eb9db4a3f9c71e910a6ad8bef
438,347,116,570,476,540
skyio
02/03/2022 16:23:22
i mean yeah that makes sense. is there a formula/way i would plug in the values that I have to come to the conclusion of there being roots on the function?
1
0
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205,877
help-1
70bff34eb9db4a3f9c71e910a6ad8bef
438,347,116,570,476,540
skyio
02/03/2022 16:34:45
oh shit wait i think i figured this one out
1
0
null
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205,878
help-1
47f8ffbd5447424eabf37c56207d9881
392,059,922,390,450,200
maybe
02/03/2022 16:51:36
https://cdn.discordapp.c…7326/unknown.png
unknown.png
1
0
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205,878
help-1
47f8ffbd5447424eabf37c56207d9881
261,933,205,387,477,000
riemann
02/03/2022 16:53:36
6 is in the wrong spot
0
1
null
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205,878
help-1
47f8ffbd5447424eabf37c56207d9881
392,059,922,390,450,200
maybe
02/03/2022 16:53:44
ooh
1
0
null
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null
205,878
help-1
47f8ffbd5447424eabf37c56207d9881
261,933,205,387,477,000
riemann
02/03/2022 16:53:54
so is 8
0
1
null
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205,878
help-1
47f8ffbd5447424eabf37c56207d9881
392,059,922,390,450,200
maybe
02/03/2022 16:54:06
smh
1
0
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null
205,878
help-1
47f8ffbd5447424eabf37c56207d9881
392,059,922,390,450,200
maybe
02/03/2022 16:55:17
https://cdn.discordapp.c…3972/unknown.png
unknown.png
1
0
null
null
null
null
null
205,878
help-1
47f8ffbd5447424eabf37c56207d9881
261,933,205,387,477,000
riemann
02/03/2022 16:55:29
i think you have numbers for everything in the inclusion-exclusion formula
0
1
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205,878
help-1
47f8ffbd5447424eabf37c56207d9881
261,933,205,387,477,000
riemann
02/03/2022 16:55:32
https://en.wikipedia.org/wiki/Inclusion%E2%80%93exclusion_principle
0
1
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help-1
47f8ffbd5447424eabf37c56207d9881
261,933,205,387,477,000
riemann
02/03/2022 16:55:45
https://cdn.discordapp.c…t_1.55.41_PM.png
Screen_Shot_2022-02-03_at_1.55.41_PM.png
0
1
null
null
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205,878
help-1
47f8ffbd5447424eabf37c56207d9881
261,933,205,387,477,000
riemann
02/03/2022 16:56:12
A, B, and C are the sports
0
1
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205,878
help-1
47f8ffbd5447424eabf37c56207d9881
392,059,922,390,450,200
maybe
02/03/2022 16:56:59
i wasnt introduced to that at my level
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