### Home > CALC > Chapter 7 > Lesson 7.3.3 > Problem7-133

7-133.

Set up each integral in terms of $u$. Be careful of the bounds. You do not need to solve the problem.

1. $\int _ { 0 } ^ { 2 } x e ^ { 3 x ^ { 2 } } d x$

Let $u = 3x^²$. Write a new integrand AND write new bounds.

1. $\int _ { - 2 } ^ { 3 } \frac { 5 x ^ { 2 } } { x ^ { 3 } + 1 } d x$

Remember that the current bounds are $x$-values. They need to be converted to $U$-values.