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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 n...
https://cdn.discordapp.c…1760/Cattura.PNG
Cattura.PNG
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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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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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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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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
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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
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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
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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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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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647,035,568,076,881,900
core
02/03/2022 10:26:23
but i still have 3 variables..
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0
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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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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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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`
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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`
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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
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0
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:36:13
wait sorry nvm
1
0
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null
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:36:58
you should get `(something) * y = (something)`
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1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:37:47
m^2=2y+4
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null
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
647,035,568,076,881,900
core
02/03/2022 10:37:50
so 2?
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:21
...
0
1
null
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null
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:28
how did this happen
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null
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help-1
1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:30
can you show all your steps please
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1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:39:32
preferably on paper
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null
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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
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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
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1ed2083b18b84d12ba7c78fe5bdb9e5b
183,668,144,404,037,630
Ann
02/03/2022 10:49:56
everything up to and including the third line is okay
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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
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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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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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