Jika f-1(x)=x-1/5 dan g-1(x)=3x-1/2 maka (gof)-1(6)= adalah

f-1(x) = (x -1)/5 dan g-1(x) = (3x- 1)/2
(g o f)-1(x) = f-1 o g-1(x)
f-1 o g-1(6) = f -1 { g-1(x) }
f-1 { g-1(6) }
= f-1 (3.6 - 1)/2
= f-1(17/2)
= (17/2-1)/5
= (15/2) / 5
= 3/2