The inverse of the function f : R → R given by $f(x)=2 x+7$ is:
Answer & explanation
Correct answer: option 4
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 $f^{-1}(x)=\frac{x-7}{2}$
The inverse of the function f : R → R given by $f(x)=2 x+7$ is:
Correct answer: option 4
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 $f^{-1}(x)=\frac{x-7}{2}$