Question

Dada f(x)=2x² + 6x - 3 / 2x-5. Calcule a f(x) para x= -1

Answer 1

Resposta:

Boa noite!

$f(-1)=1$

Explicação passo-a-passo:

$f(x)=\dfrac{2x^{2} +6x-3}{2x-5} ||x=-1\\\\\\f(-1)=\dfrac{2(-1)^{2} +6(-1)-3}{2(-1)-5} \\\\\\f(-1)=\dfrac{2\cdot1 -6-3}{-2-5} \\\\\\f(-1)=\dfrac{2-9}{-7} \\\\\\f(-1)=\dfrac{-7}{-7} \\\\\\f(-1)=1$