Question

If f(x)= 4-3x, evaluate f ^-1 (-8) and f ° f ^-1 (2).
PLEASE FAST.....
Ans....4, 2.
Show process!!!!!

Answer 1

y= f(x)= 4-3x , 4-3x = y ,x= 4-y/3

f^-1y= x

f^-1y= 4-y/3

f^-1 (-8)= 4-8/3=-2/3