Question

PLEASE HELP ITS A FUNCTION

Answer 1

f(3) is equal to 23.

In order to solve for f(3), you must put 3 in for all values of x. This is what the notation of the 3 being in parenthesis means. So we take the original and place 3 in every time we see x.

f(x) = $2x^{2} + 5 \sqrt{x - 2}$

f(3) = $2(3)^{2} + 5 \sqrt{(3) - 2}$

f(3) = $2(9) + 5 \sqrt{1}$

f(3) = $18 + 5(1)$

f(3) = $18 + 5$

f(3) = $23$