Question

HELP ASAP PLEASE!!!

If f(x)=5x-1, What is f^-1 (f(2))?

A. 44

B. -2

C. -44

D. 2

Answer 1

(D) 2

Explanation:

f(x) = 5x - 1

y = 5x - 1

5x = y + 1

x = (y + 1)/5

f⁻¹ (x) = (x + 1)/5

f(x) = 5x - 1

f(2) = 5(2) - 1

f(2) = 9

f⁻¹ (x) = (x + 1)/5

f⁻¹ (f(2)) = (9 + 1)/5

f⁻¹ (f(2)) = 2