Question

If f(x) = 6x - 4 and g(x) = 2x^3, find g(3) - f(4)

Answer 1

To solve the problem, simply plug in the value for x in both functions, as shown below:

$f(4) = 6(4) - 4$

--> $f(3) = 24 - 4$

---> $f(3) = 20$

$g(3) = 2(3)^3$

--> $g(3) = 2 * (3^3)$

---> $g(3) = 2 * 27$

----> $g(3) = 54$

$g(3) - f(4) = 54 - 20$, so the answer is 34.