Question

Given the polynomial function below find f(3)

f(x)=2x^3-7x+1

A) -8
B) -2
C) 34
D) 26

Answer 1

f(x) = 2x^3 - 7x + 1

f(3): so we now substitute x = 3

f(3) = 2*(3^3) - 7*(3) + 1

= 2*(27) - 21 + 1 3^3 = 3*3*3 = 27

= 54 - 21 + 1

= 34

Option C.

Thanks for the question.

Answer 2

C) 34

Explanation:

Given,

`f(x)=2x^3-7x+1-----(3)`

For finding f(3),

Substitute x = 3 in equation (1),

We get,

`f(3) = 2(3)^3-7(3)+1`

`=2(27)-21+1`

`=54-20`

`=34`

`\implies f(3)=34`

Hence, the value of f(3) is 34,

Option C) is correct.