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August 20, 2014

August 20, 2014

Posted by **Ifi** on Sunday, October 28, 2012 at 3:43am.

My f'(x) is-6x/(x^2+1)^2, after that i didnt know how to proceed next bcus i didnt know how to find x to substitute in the f'(x).

- Math -
**Steve**, Sunday, October 28, 2012 at 5:52amAssuming your f' is correct, f is increasing where f'>0.

Since the denominator is always positive, f is increasing where the numerator is positive: x<0

Similarly for decreasing.

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