Question
identify $u$ and $d u / d x$ for the integral $\int u^{n}(d u / d x) d x .$$$\int 3 x^{2} \sqrt{x^{3}+1} d x$$
Step 1
In this case, we can see that $u$ is the function inside the square root, and $du/dx$ is the function being multiplied outside the square root. So, we have: $$u=x^{3}+1$$ $$du/dx=3x^{2}$$ Show more…
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