Question

Find the inverse of 2x - 7 and also, find f^-1(-2)..

when it said f^-1(-2), i have to substitute -2 on the inverse of 2x -7 right?

Answer 1

that is correct, so what is the inverse?

Answer 2

y + 7 / 2 ?? :)

Answer 3

remember you're swapping x and y, then solving for y

so you should get (x+7)/2

which means it looks like you have it pretty much

Answer 4

so

f^(-1)(x) = (x+7)/2

f^(-1)(-2) = (-2+7)/2 ... plug in x = -2

f^(-1)(-2) = ???

Answer 5

ahhh, okayyyy...5/2 :)

Answer 6

correct

Answer 7

thanks! :)

Answer 8

you're welcome