Question

Let $f$ be a function such that $f$ : $x\to 2x^2+3$. Find the value of : $f\left(3\right)$.

Answer 1

Given, $f$ is a function such that $f\to 2x^2+3$

Therefore, $f\left(3\right)=2\left(3^2\right)+3$

$=2\left(9\right)+3$

$=18+3$

$=21$