If f (x) = - 15x-5, then f^-1 (x) =

Question

Terrence French

Mathematics

26 January, 18:28

If f (x) = - 15x-5, then f^-1 (x) =

+3

Answers (1)

Know the Answer?

Marlon · Answer 1

(x+5) / -15 = f^-1 (x)

Step-by-step explanation:

f (x) = - 15x-5

y = - 15x-5

Exchange x and y

x = - 15y - 5

Solve for y

Add 5 to each side

x+5 = - 15y - 5+5

x+5 = - 15y

Divide by - 15

(x+5) / -15 = - 15y/-15

(x+5) / -15 = y

(x+5) / -15 = f^-1 (x)