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(Solved): 5.3 hw. please help (a) Differentiate \( x^{3}+x \). \[ \frac{d}{d x}\left(x^{3}+x\right)= \] (b) Us ...
5.3 hw. please help
![(a) Differentiate \( x^{3}+x \).
\[
\frac{d}{d x}\left(x^{3}+x\right)=
\]
(b) Use the Fundamental Theorem of Calculus to find](https://media.cheggcdn.com/study/9a4/9a455959-b609-4f14-941d-d72d9fd81cb4/image)
(a) Differentiate \( x^{3}+x \). \[ \frac{d}{d x}\left(x^{3}+x\right)= \] (b) Use the Fundamental Theorem of Calculus to find \( \int_{0}^{3}\left(3 x^{2}+1\right) d x \). \[ \int_{0}^{3}\left(3 x^{2}+1\right) d x= \]