i have the equation:

$\displaystyle

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

$

$\displaystyle

f(x)= root(x+1)

$

so i get this

$\displaystyle (root(x+h+1)-root(x+1))/h$

when i check the answer i have this :

$\displaystyle 1/(root(x+h+1)+root(x+1))$

i do not know how to go from what i have to the answer.

for some reason √ doesnt like it in math wrap.