Question

Dada a função f tal que f(x)=-2x²+3x-1, obtenha:
A) f(1)
B) f(2)
C) f(0)
D) f(-1)
E) f(-2)

Answer 1

a) f(1) = -2 . 1² + 3.1 -1
f(1) = -2 + 3 -1
f(1) = 0

b) f(2) = -2 .2² + 3 . 2 -1
f(2) = -8 + 6 - 1
f(2) = -3

c) f(0) = 0 + 0 -1
f(0) = -1

d) f(-1) = -2 . -1² + 3 .-1 -1
f(-1) = -2 -3 -1
f(-1) = -5

e) f(-2) = -2 . -2² +3 . -2 -1
f(-2) = -8 -6 -1
f(-2) = -15