Question

need help on the attachment @Calculus1

Answer 1

derivative of the integral is the integrand. if you had an "x" as the upper limit of integration the derivative would just be
\[3x^4\] but since your upper limit is
\[x^2\] you have to use the chain rule

Answer 2

so your derivative is
\[3(x^2)^4\times 2x\] by the chain rule. clean it up and then replace x by 1