Question

If f : R $\to$ R defined by f(x) = $\frac{2x+3}{5}$, then $f^{-1}\left(x\right)=$

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

$f^{-1}\left(x\right)=y\Rightarrow x=f\left(y\right)$
$\Rightarrow x=\frac{2y+3}{5}$
$\Rightarrow y=\frac{5x-3}{2}$