If f(x) = sqrt(x+1) evaluate the following expression:

lim (f(x+h)-f(x))/ h

h->0

so my equation looks something like:

(sqrt(x+h+1)-sqrt(x+1))/h

how do i simplify the square roots? I'm thinking the h's would cancel out somehow in order for this limit not to be undefined but i don't know how that would happen.