Question

if f (x) =8x^3-2x and f(2)=8.then find f(x)

Answer 1

f(x) = 8x³-2x ......

Answer 2

Answer:

The function f(x) is $f(x)=8x^3-2x-52$.

Step-by-step explanation:

Let the given function is

$f(x)=8x^3-2x+C$

It is given that f(2)=8.

$f(2)=8(2)^3-2(2)+C$

$8=8\times 8-4+C$

$8=64-4+C$

$8=60+C$

$C=-52$

Therefore the value of C is -52 and the function f(x) is

$f(x)=8x^3-2x-52$