Question

If f(x) = 3x7 -5x +4, then f(-2) =

Answer 1

Given:

`\:f\left(x\right)\:=\:3x^7\:-5x\:+4`

Therefore,

`\begin{gathered} \mathrm{For}\:f=3x^7-5x+4\:\mathrm{substitute}\:x\:\mathrm{with}\:-2 \\ f(-2)=3\left(-2\right)^7-5\left(-2\right)+4 \end{gathered}`

Simplify

`f(-2)=3\left(-2\right)^7-5\left(-2\right)+4=-370`

Therefore,