Another integral problem!

CTBickel

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Apr 24, 2013
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2
Stuck on another one! help!

Determine the intervals on which the following function is increasing:

f(x)= integral(t^3/(1+t^2)dt) from 1 to 1-3x
 
Just like your other problem, you need to apply the derivative form of the FTOC and the chain rule...can you differentiate f(x) and equate it to zero?
 
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