# Math Help - Integral. #7

1. ## Integral. #7

If $\displaystyle \int_1^2 e^{t^2} \, dt = \alpha$

Evaluate ( in terms of $\displaystyle \alpha$ ) :

$\displaystyle \int_{e}^{e^4} \sqrt{ln (x)} \,\ dx$

2. sub
u^2 = ln (x) and change the limit of the integral