Respostas

2014-04-28T20:53:10-03:00
Basta substituir (-1) em f(x)
f(-1) = 2^(-1)+(-1)²+2*(-1)
f(-1) =1/2 + 1 -2
f(-1) = 1/2-1
f(-1) = -1/2
2014-04-28T20:54:44-03:00
f(-1) = 2^x+ x^2+2x
f(-1) = 2^-1+ (-1)^2+2(-1)
f(-1) = 1/2 + 1 - 2
f(-1) = 1/2 - 1
f(-1) = -1/2