Question

Find the inverse of f(x) = 25x2 - 3

f-1 =
Select one:
a. ±√(x + 3)/5
b. 3√(5x – 3)
c. ±9√(x + 3)
d. x^2 + 5

Answer 1

let y = 25x^2 - 3
25x^2 = y + 3

x^2 = (y +3) / 25

x = sqrt(y + 3) / 5

f-1x = sqrt(x + 3) / 5

Its a