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Gwaine
02/03/2022 05:32:20
.close
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Georgi
02/03/2022 06:03:31
how much is f(8)?
https://cdn.discordapp.c…Screenshot55.png
Screenshot55.png
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Georgi
02/03/2022 06:03:37
i have no idea how to solve this
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A Lonely Bean
02/03/2022 06:04:49
Notice that if you have x = 2, then on LHS you'll have f(8) and on RHS you'll have some number which is the answer
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Georgi
02/03/2022 06:07:53
oh, i see
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Georgi
02/03/2022 06:07:56
thank you
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CommunityVoid
02/03/2022 06:12:02
Can someone help me with these?
https://cdn.discordapp.c…20203_111149.jpg
20220203_111149.jpg
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Deleted User
02/03/2022 06:12:25
@CommunityVoid open a new channel
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CommunityVoid
02/03/2022 06:12:32
How?
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Deleted User
02/03/2022 06:12:54
#help-10|feni ask here
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CommunityVoid
02/03/2022 06:13:10
Oh ok
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G E L A
02/03/2022 06:53:18
Anyone can help me with Differential Equation?
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G E L A
02/03/2022 06:53:35
https://cdn.discordapp.c…1622/unknown.png
unknown.png
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Moth
02/03/2022 06:54:47
Please read #❓how-to-get-help instead of occupying other people's channels
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ramonov
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thehackpod
12/24/2021 08:16:33
Hello, I was trying to solve this integral. I want to get rid of the absolute value, in that case the exercise will be very easy, but I don't know how to. I don't want to use other formulas (except if they are really necessary) as the integration by parts, because these exercises most of the time are very easy and do not require those techniques.
https://cdn.discordapp.c…1760/Cattura.PNG
Cattura.PNG
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A Lonely Bean
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A Lonely Bean
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Sup?
12/24/2021 08:20:07
break it into two integrals
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help-1
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Sup?
12/24/2021 08:20:43
you have 1 < x < 3, so in which interval is x-2 positive and in which interval is x-2 negative
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help-1
d801c6966aec42b5811917934eace07c
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Sup?
12/24/2021 08:20:49
then use definition of absolute value
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thehackpod
12/24/2021 08:22:47
That worked, thanks a lot!
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thehackpod
12/24/2021 08:22:49
.close
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LowGunx
02/03/2022 07:40:46
What steps do i take to work this out?
https://cdn.discordapp.c…1840/unknown.png
unknown.png
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Neurotransmitter
02/03/2022 07:41:37
start with putting like terms on one side
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help-1
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LowGunx
02/03/2022 07:42:48
so - 2 on both sides
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help-1
70fce809b8824aeca38e9549bbb4f871
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LowGunx
02/03/2022 07:42:55
Then + 48t on both sides?
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help-1
70fce809b8824aeca38e9549bbb4f871
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Neurotransmitter
02/03/2022 07:43:00
23t < 12
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help-1
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A Lonely Bean
02/03/2022 07:43:08
I'd rather consider doing +71t after that
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help-1
70fce809b8824aeca38e9549bbb4f871
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LowGunx
02/03/2022 07:47:59
Then is it divide both sides by 23
1
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LowGunx
02/03/2022 07:48:03
and flip the sign
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kirby your mom
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A Lonely Bean
02/03/2022 07:50:27
Why'd you flip the sign tho
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A Lonely Bean
02/03/2022 07:50:34
23 is clearly not negative
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LowGunx
02/03/2022 07:51:15
oh you only flip if you divide or multiply by negative right
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A Lonely Bean
02/03/2022 07:51:46
Yes
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LowGunx
02/03/2022 07:52:45
Ok cool thanks
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LowGunx
02/03/2022 07:56:10
.close
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Quaip
02/03/2022 08:09:32
https://cdn.discordapp.c…2107/unknown.png
unknown.png
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Quaip
02/03/2022 08:09:35
what does this mean
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Quaip
02/03/2022 08:15:03
this chat is used dude
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punchster2
02/03/2022 08:15:09
oh wait whops
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liks
02/03/2022 08:34:58
Do you have the context?
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Quaip
02/03/2022 08:43:50
its from fraunhofer diffraction
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core
02/03/2022 09:26:15
help pls
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core
02/03/2022 09:27:15
find the value of m for which the following simultaneous equations have infinitely many solutions : mx-2y=4 x+(m-3)y=m
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1ed2083b18b84d12ba7c78fe5bdb9e5b
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core
02/03/2022 09:30:22
i think my working is wrong but idk how
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
356,908,116,429,897,700
Kaynex
02/03/2022 09:31:08
Row reduce
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core
02/03/2022 09:31:47
yep but my teacher wants without matrices
1
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
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Kaynex
02/03/2022 09:32:32
Then don't use matrices haha
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
356,908,116,429,897,700
Kaynex
02/03/2022 09:32:41
Row reduce in equation form
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core
02/03/2022 09:34:13
can u show me the working for this with substitution?
1
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183,668,144,404,037,630
Ann
02/03/2022 10:09:09
show work?
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Ann
02/03/2022 10:09:21
if you show your work then your mistake can be identified
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core
02/03/2022 10:15:17
1. mx-2y=4 4-mx = -2y 4-mx/-2 = y gradient is m/2 2. x+(m-3)y=m (m-x)/(m-3) = y thus gradient is = (m-x)/(m-3) thus (m-x)/(m-3) = m/2 2(m-1) = m(m-3) 2m -2 = m^2 -3m -2=m^2 -3m -2m -2=m^2 -5m -2 = m(m-4) -2/(m-4)=m and then tbh idk what i did after that
1
0
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core
02/03/2022 10:15:19
but
1
0
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core
02/03/2022 10:15:26
i got it wrong
1
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Ann
02/03/2022 10:15:35
alright uh
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1ed2083b18b84d12ba7c78fe5bdb9e5b
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Ann
02/03/2022 10:15:36
do you have this on paper
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1ed2083b18b84d12ba7c78fe5bdb9e5b
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Ann
02/03/2022 10:15:55
because already in the third line i can see some missing parentheses
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core
02/03/2022 10:16:16
yes one sec
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Ann
02/03/2022 10:16:27
also your statement of "gradient is = (m-x)/(m-3)" is just incorrect, plain and simple
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1ed2083b18b84d12ba7c78fe5bdb9e5b
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Ann
02/03/2022 10:17:19
and then you replace x with 1 for whatever reason...
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core
02/03/2022 10:19:40
thats how the teacher taught us how to do it 💔
1
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Ann
02/03/2022 10:21:25
are you sure that's how the teacher taught you to do it and not the result of you misremembering, screwing up when writing things down, or mis-extrapolating from worked examples?
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core
02/03/2022 10:22:03
alr im confused
1
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core
02/03/2022 10:22:34
i think i attempted another question and it worked out but maybe that was luck im not sure which way is correct then
1
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1ed2083b18b84d12ba7c78fe5bdb9e5b
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core
02/03/2022 10:22:40
how do i go about solving this?
1
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1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:22:43
okay so
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Ann
02/03/2022 10:22:50
the way i would go about solving this
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Ann
02/03/2022 10:23:04
is to reduce the analysis of this system of equations to the analysis of one equation in one variable
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1ed2083b18b84d12ba7c78fe5bdb9e5b
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core
02/03/2022 10:23:23
like elimination?
1
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Ann
02/03/2022 10:23:33
eh
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Ann
02/03/2022 10:23:38
elimination is one way to go about it, yes
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Sɐɯuǝl
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Ann
02/03/2022 10:23:51
all methods of solving systems of equations rely on reducing the number of variables tho
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Ann
02/03/2022 10:23:56
elimination, substitution, whatever else really
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core
02/03/2022 10:24:15
im better at sub so if i sub one equation into the other?
1
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Ann
02/03/2022 10:24:27
ok, sure
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1ed2083b18b84d12ba7c78fe5bdb9e5b
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Ann
02/03/2022 10:24:32
if you want to substitute then substitute
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Ann
02/03/2022 10:24:52
to minimize headache i would recommend isolating x in the second equation `x + (m-3)y = m` and substituting it into the first
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core
02/03/2022 10:25:15
ohh
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1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:26:23
but i still have 3 variables..
1
0
null
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null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:28:07
you do not
0
1
321,445,119,171,756,000
Shuri2060
9525
a μ-er
false
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:28:13
you have 2 variables and 1 parameter
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1
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205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:28:22
well, 2 unknowns and 1 parameter i guess
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1
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205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:30:10
isolaying x in x + (m-3)y = m should give you `x = (3-m)y + m`
0
1
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205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:30:36
plugging that itnto mx - 2y = 4 should give you `m[(3-m)y + m] - 2y = 4`
0
1
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null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:30:46
simplify that slowly and carefully
0
1
321,445,119,171,756,000
Shuri2060
9525
a μ-er
false
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:35:35
m= 4+2y
1
0
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:36:13
wait sorry nvm
1
0
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:36:58
you should get `(something) * y = (something)`
0
1
null
null
null
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null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:37:47
m^2=2y+4
1
0
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:37:50
so 2?
1
0
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:21
...
0
1
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:28
how did this happen
0
1
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:30
can you show all your steps please
0
1
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null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:32
preferably on paper
0
1
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:44:58
yes
1
0
675,710,631,143,538,700
wakandust
7085
wakandust
false
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:45:13
this
1
0
null
null
null
null
null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:45:40
https://cdn.discordapp.c…1E2A795BE718.jpg
6BD777D5-FE7B-4FBC-9B49-1E2A795BE718.jpg
1
0
null
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null
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null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:49:56
everything up to and including the third line is okay
0
1
null
null
null
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null
205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:50:05
4th line contains bullshit, and the 5th contains even more bullshit
0
1
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205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:51:59
personally though it appears that i should have been more explicit in saying you should treat this as a linear equation in y (which it is, even if non-obviously so)
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205,867
help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:53:01
``` m[(3-m)y + m] - 2y = 4 m(3-m)y + m^2 - 2y = 4 (3m - m^2)y + m^2 - 2y = 4 (3m - m^2 - 2)y + m^2 = 4 (-m^2 + 3m - 2)y = 4 - m^2 (m^2 - 3m + 2)y = m^2 - 4 ```
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