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Definition of Functions

If fx=x3-4x...

Question

If $f (x) = x^{3} - 4 x + 1$ , find $f (3)$ .

A

18

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B

16

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C

8

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D

64

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Solution

The correct option is D $16$
$f (x) = x^{3} - 4 x + 1$
$f (3) = (3)^{3} - 4 (3) + 1$
$f (3) = 27 - 12 + 1$
$f (3) = 16$

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