when solving, please use this : (f(c+h)-f(c))/h

QUESTION 9 Find the first derivative f .( x ) of f (x ) = - for all x in the domain of f 1 - x O a. "f ( x) = - - 1, for all x # 1. x- 1 O b. - f ( x ) = - for all x * 1. ( 1 -x) 2 Oof. ( x ) = 1 for all x * 1. (x - 1) 2 O d. f. ( x ) = for all x * 1. ( 1 -x) 3 QUESTION 10 Let f(x) =|x-2. Find lim f ( 2 th) -f (2 ) h-0+ h