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May 3, 2015

Homework Help: calculus

Posted by andy on Saturday, July 20, 2013 at 7:28pm.

If f(x)=∫ (from -x to x) cos(t)/(1+e^t) dt and x=asin(77/85), then the absolute value of f′(x)−f(x) can be expressed as a/b, where a and b are coprime positive integers. What is the value of a+b?

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