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November 27, 2014

November 27, 2014

Posted by **jess** on Friday, July 22, 2011 at 4:12am.

[ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]

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