Question

Dada a função f: R + R por f(x) = x2 + 2x, determine o
valor de f(2) + f(3) – f(1).​

Answer 1

Olá!

f(x) = x² + 2x

f(2) = 2² + 2 * 2

f(2) = 4 + 4 = 8

f(x) = x² + 2x

f(3) = 3² + 2 * 3

f(3) = 9 + 6 = 15

f(x) = x² + 2x

f(1) = 1² + 2 * 1

f(3) = 1 + 2 = 3

f(2) + f(3) – f(1)

8 + 15 - 3 = 20.