Solve Improper Integral Homework - Get Help Now!

[yecko]

Homework Statement

https://holland.pk/uptow/i4/7d4e50778928226bfdc0e51fb64facfb.jpg

Homework Equations

improper integral

The Attempt at a Solution

(attached)
Whats wrong with my calculation?
I cannot figure it out after hours...
Thank you very much!

 

[Eclair_de_XII]

In the substitution, it's actually $\frac{du}{dx}=\frac{1}{2\sqrt{x}}$.

 

[yecko]

oh yes. thank you