# Math Help - u substition

1. ## u substition

Suppose
Evaluate the following

im not sure what this is asking me to do, I know that if i let t/4 be u then change the end points i get the same thing..

2. Originally Posted by acosta0809
Suppose
Evaluate the following

im not sure what this is asking me to do, I know that if i let t/4 be u then change the end points i get the same thing..
If $u = \frac{t}{4}$ then $t = 4u$ so $dt = 4 du$ so the second integral becomes

$
4 \int_0^4 g(u) du
$