Question

seja a função definida por f(x)=x2-1. Calcule f(1/2)

Answer 1

f(1/2) = 
f(x) = x^2 - 1
f(1/2) = (1/2)^2 - 1
f(1/2) = 1/4 - 1 mmc
f(1/2) = (1 - 4)/4
f(1/2) = -3/4