Question

Considere a função F(x) = 3x² - x +4. Calcule f(1) e f (x) para x = 4​

Answer 1

$f(x) = 3x^2 - x + 4 \\ \\f(1) = 3 \times 1^2 - 1 + 4 \\f(1) = 3 \times 1 + 3\\ f(1) = 3 + 3 \\f(1) = 6 \\ \\ f(4) = 3 \times 4^2 - 4 + 4 \\f(4) = 3 \times 16\\f(4) = 48$