Question

Pfv pessoal me ajudem

Dada a função f(x)=x2+2x, determine f(2)+f(3)-f(1)

Answer 1

Bom Dia !!!

$f(x) = x^{2} + 2x \\\\Trocamos\ x\ por\ cada\ valor\ pedido:\\\\f(2) = 2^{2} + 2.2\\\\f(2) = 4 + 4\\\\f(2) = 8\\\\\\f(3) = 3^{2} + 2.3\\\\f(3) = 9 + 6\\\\f(3) = 15\\\\\\f(-1) = (-1)^2 + 2(-1)\\\\f(-1) = 1 -2 \\\\f(-1) = -1$

Somando:

8 + 15 - (-1)

23 - (-1)

23 + 1

Resultado = 24

Espero ter ajudado :-)

Att: LDC