Sports freak, I'm happy that I don't need to. Days of school overrrrrrrrrr for now. Thanx for pointing out anyway.

Ya I find something wrong with my solution

If the derivative was with respect to (x+5) i think my earlier solution would be right.

d ln(x+5)^1/2 / d (x+5) = .5 (x+5)^{- .5}

but with respect to x only nooooooo.
Sorry for giving wrong solution. My baddddddddd     :)