Question

Definite Integral Help

Answer 1

Find the definite integral from 2 to a.
Of (xe^9x^2)

Answer 2

I don't understand your integral

Answer 3

I believe it is meant to appear as this:
\( \displaystyle \int_{2}^{a} x e^{9x^2} \ dx \)
Notice that we have a function and something close to its derivative multiplied with dx. It is ripe for a u-substitution!
\( \large \displaystyle \int_{2}^{a} \color{blue}x e^{\color{#05f}{9x^2}} \color{blue}{\ dx} \)
u = 9x^2
du = 18x dx We can just move constant coefficients onto du to directly substitute for dx.