Question

Se f(x) = x2 −1/x−1, achar: (b) f(1/2)

Answer 1

Boa tarde 

f(x) = (x² - 1)/(x - 1)

f(1/2) = (1/4 - 1)/(1/2 - 1)
f(1/2) = (-3/4)/(-1/2) 
f(1/2) = (3/4)/(1/2) = 3/2