(b) ( int_{0}^{1} x^{3} sqrt{1+x^{2}} d x )
Added by Iris K.
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To solve this, we look for a substitution that simplifies the integral. Notice that the derivative of \(x^2\) is \(2x\), which is similar to part of the integrand. This suggests using a substitution involving \(1+x^2\). Show more…
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