Question

Other Pre-calc question :
"Find a formula for f^-1(x). Give the domain of f^-1, including any restrictions "inherited" from f.

f(x) = 3x-6"

Can you explain how you get this answer?

Answer 1

for f inverse of x: let y=3x-6:
solve for x,So:
(y+6)/3=x,then
switch x and y

Answer 2

so y=(x+6)/3

Answer 3

then that is f(inverse) of x

Answer 4

then the range of f becomes the domain of f inverse

Answer 5

And how do you find out the restrictions?

Answer 6

i don't think there are any restrictions- because in order to have a restriction, you have to have division by zero

Answer 7

Oh. Thank you very much! :D

Answer 8

no prob