Originally Posted by

**JonathanEyoon** x / (sqrt (x^2 - 4)) from 0 to 4

I chose to use trig substitution to do this problem but realized i couldn't set a lower boundary in terms of theta for 0......or...can I?

THEN, I realized i could use u substitution..... anyways when I used that, I quickly came to a part where I would have to find the square root of -4 which... doesn't give me a real number answer. Can someone shed some light onto me for this problem?

I'm gonna go ahead and throw it out there, but would this by chance be an improper integral? Thanks