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Q. 1

Expert-verifiedFound in: Page 256

Book edition
6th

Author(s)
Sullivan

Pages
1200 pages

ISBN
9780321795465

Find $f\left(3\right)$ if $f\left(x\right)=-4{x}^{2}+5x$.

The value of $f\left(3\right)=-21$.

The given function is :

$f\left(x\right)=-4{x}^{2}+5x$

The value of $f\left(3\right)$ is

$\begin{array}{rcl}f\left(3\right)& =& -4\times {3}^{2}+5\times 3\\ f\left(3\right)& =& -4\times 9+15\\ f\left(3\right)& =& -36+15\\ f\left(3\right)& =& -21\end{array}$

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