Question

If you let u=1+x^(5) in the integral ∫x^(4)tan(1+x^(5))dx, what is du?

Answer 1

B

Explanation:

u = 1 + x⁵

du/dx = 5x⁴

du = 5x⁴dx

Answer 2

B du = 5 x^4 dx

Explanation:

If u = 1+ x^5

To find du we take the derivative of u with respect to x

du = 5 x^4 dx