Question

Write the inverse of f(x) = x + 5

Answer 1

f^-1(x) = x - 5

Explanation:

f(x) = x + 5

y = x + 5

x = y + 5

y = x - 5

f^-1(x) = x - 5

Answer 2

f^ -1(x) = x - 5

Explanation:

y =x+5

To find the inverse, exchange x and y

x = y+5

Solve for y

Subtract 5 from each side

x-5 = y+5-5

x-5 = y

The inverse is x-5