Integration help, urgent.

As written, the integral of 2x/x^2+1 is x+ 2log(x) + constant.

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The derivative of X^2+1=2x, you probably didn't spot that.
When you see a fraction, look for derivatives as it makes it much easier than substitution.
And good luck, please no annoying vector questions :(.
 
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Thank you all for the quick replies, especially Amleto and RomanNose.

Makes sense now.

The derivative of X^2+1=2x, you probably didn't spot that.
When you see a fraction, look for derivatives as it makes it much easier than substitution.
And good luck, please no annoying vector questions :(.

Thanks good luck to you as well, I have a feeling it isn't going to go well for me but I've done my best.
 
The derivative of X^2+1=2x, you probably didn't spot that.
When you see a fraction, look for derivatives as it makes it much easier than substitution.
And good luck, please no annoying vector questions :(.

This.

Make it the first thing you check in an integral question involving a fraction. I will probably forget to do this in the exam tomorrow.:D
 
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