Question

Calculate the following polynomial the value of f (1) and f (-1)​

Answer 1

Answer:

f(1) = 8

f(-1) = 2

Step-by-step explanation:

Hii Mate ^_^

f(x) = 2x³+x²+x+4

So,

f(1) = 2(1)³+(1)²+1+4

    = 2(1)+1+5

    = 2+6

    = 8

f(-1) = 2(-1)³+(-1)²+(-1)+4

     = 2(-1)+1-1+4

     = -2+4

     = 2

HOPE IT HELPS,

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Answer 2

$\large\bf{\underbrace{\red{SOLUTION:-}}}$

$\rm{\boxed{f(x)\:=\:2x^3\:+\:x^2\:+\:x\:+\:4\:}}$

✴️ ‘f(1)’ is,

$\rm{\implies\:f(1)\:=\:2\times{1}^3\:+\:(1)^2\:+\:1\:+\:4\:}$

$\rm{\boxed{\implies\:f(1)\:=\:8\:}}$

✴️ ‘f(-1)’ is,

$\rm{\implies\:f(-1)\:=\:2\times{(-1)}^3\:+\:{(-1)}^2\:+\:(-1)\:+\:4\:}$

$\rm{\boxed{\implies\:f(-1)\:=\:2\:}}$