jika f (x)=2x-b dan f -1 (-1) =0. maka (f0f0f) (1)=....

f(x) = 2x-b
f -1 :
y = 2x-b
x = (y+b)/2
f -1 = (x+b) /2
f -1(-1)=(-1+b) /2
0 = -1+b
b = 1
f(x) = 2x-1
f•f•f(1)= 2(2(2(1)-1)-1)-1 =1