Question

If f(x) = 5x + 3, then what is f-1(x) ?

Answer 1

\[y = 5x+3\]Now swap x and y, and solve for y
\[x = 5y+3\]\[y = f^{-1}(x) = ?\]

Answer 2

no clue:((((((((

Answer 3

Oh it's easy.
\[x = 5y+3\]Solve that for y in terms of x, and the result is your \(f^{-1}(x)\).

Hint, subtract 3 from both sides. Then...

Answer 4

\[x - 3 = 5y + 3 - 3\]\[x - 3 = 5y\]\[y = ?\]