please help with the following questions

Topic A: Functions 1. ) If f (x) = 4x -x2, find: C. ) f(xth ) - f (xx ) 2h 2 2.) If V (r) = - ar', find: 11 936 a. ) V 1 w b . ) V (r+1 ) - V(r-1) V ( 2r) C.) V (r) 3. ) 3.) If f (x) and g (x) are given in the graph, find: a . ) ( f - 8) (3) b. ) f (8 (3 ) ) 4.) Fi .eco -texas the -X , x