# Where have I gone wrong? (FP2)Watch

Thread starter 4 years ago
#1
Solve the equation

Integrating factor =

And from then on it's quite obviously going to go wrong. Where did I make a mistake/s? This is a complete trainwreck and my guess is that it was a basic error very early on, but I'm not sure.
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4 years ago
#2
(Original post by Chlorophile)
Solve the equation

Integrating factor =

And from then on it's quite obviously going to go wrong. Where did I make a mistake/s? This is a complete trainwreck and my guess is that it was a basic error very early on, but I'm not sure.
Your integral:
Is not correct.
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4 years ago
#3
(Original post by Chlorophile)
Solve the equation

Integrating factor =

And from then on it's quite obviously going to go wrong. Where did I make a mistake/s? This is a complete trainwreck and my guess is that it was a basic error very early on, but I'm not sure.
Have a look at that last integral again, you've got mixed up with
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Thread starter 4 years ago
#4
(Original post by joostan)
Your integral:
Is not correct.
I integrated the 5x(1-x^2)^1.5 part incorrectly?
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4 years ago
#5
(Original post by Chlorophile)
Solve the equation

Integrating factor =

And from then on it's quite obviously going to go wrong. Where did I make a mistake/s? This is a complete trainwreck and my guess is that it was a basic error very early on, but I'm not sure.

apart from an obvious typo in the very last line, I cannot see at first glance anything wrong.

why do you think it is wrong?
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4 years ago
#6
(Original post by Chlorophile)
I integrated the 5x(1-x^2)^1.5 part incorrectly?
Yup you might want to look at your arithmetic again.
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Thread starter 4 years ago
#7
Right, I realised what I did wrong. For some reason I thought 1/(1-x^2)^3/2 = (1-x^2)^2/3 (embarrassing). Thanks! (Virtual rep for all of you, I've run out for today)
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4 years ago
#8
Check your integration when finding the integrating factor. The integral you've written down doesn't evaluate to that.
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4 years ago
#9
(Original post by JerzyDudek)
Check your integration when finding the integrating factor. The integral you've written down doesn't evaluate to that.
how come?
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4 years ago
#10
(Original post by TeeEm)
how come?
Oh pardon me, I've misread the notation.
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4 years ago
#11
(Original post by JerzyDudek)
Oh pardon me, I've misread the notation.
no worries
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4 years ago
#12
A bit random but would anyone say dropping M1 for FP2 is stupid as I dislike Mechanics?Also pure modules are helpful for someone like me as Im doing Economics and a lot of Further methods are used I believe whereas I would almost never use any M1 methods in econ.
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4 years ago
#13
(Original post by Rkai01)
A bit random but would anyone say dropping M1 for FP2 is stupid as I dislike Mechanics?Also pure modules are helpful for someone like me as Im doing Economics and a lot of Further methods are used I believe whereas I would almost never use any M1 methods in econ.
Maybe you should start your own thread.
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