The functions f and g are defined for R. f : x → 3x + a g : x → b − 2x where a and b are constants. Given that ff(2) = 10 and (2) = 3, find (i) values of 'a' and 'b' [4]
a=3 b=-6
a=2, b=-8
a=-2 , b=8
a=2 , b=-9
(ii) an expression for fg(x).
22-6x
55+6x
35-6x
23-7x