Simplify difference quotients.

Question

1/(1+h)-1/h

I got 1-1-h/h

but the answer is -1/(1+h)

Answer 1

(1/(1+h) - 1/1)/h
(1-(1+h))/(1+h) / h
(1-1-h)/(1+h) / h
-h/(1+h) / h
-1/(1+h)