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# c4 integrating with partial fractions - need help! Watch

1. Divided it to give

Then splitting the fraction into partial fractions, I get

and this does not integrate to the correct answer, which is

ln bit has a modulus, but I dunno how to do that sign

I get the x+2 on top and the x-2 on the bottom. Where have I gone wrong?
2. (Original post by lollage123)

This should be +4 since
3. (Original post by TenOfThem)
This should be +4 since
How? When I divide it using the polynomial division method the -4 just gets carried down and the remainder is -4/(x^2 - 4)
4. (Original post by lollage123)
How? When I divide it using the polynomial division method the -4 just gets carried down and the remainder is -4/(x^2 - 4)
I am not sure what you mean by "carried down"

But, during polynomial division you would be looking at subtracting -4 which still gives +4
5. (Original post by TenOfThem)
I am not sure what you mean by "carried down"

But, during polynomial division you would be looking at subtracting -4 which still gives +4
silly blunder, thank you
6. (Original post by lollage123)
silly blunder, thank you
np

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