Practicing Success
Practicing Success
CUET Preparation Today
The inverse of the function f : R → R given by $f(x)=2 x+7$ is: |
$2(x+7)$ $\frac{x+7}{2}$ $x-7$ $\frac{x-7}{2}$ |
$\frac{x-7}{2}$ |
The correct answer is Option (4) - $\frac{x-7}{2}$ $f(x)=2x+7$ $⇒y=2x+7⇒y-7=2x$ $⇒x=\frac{y-7}{2}$ so $f^{-1}(x)=\frac{x-7}{2}$ |
