Question

Dada a função f(x)x²-3x, determine
a)f(-3)
b)f(0)
c)f(3)
d)f(4)-f(-4)/2

Answer 1

f(x) = x² - 3x

a) f(-3) = (-3)² - 3.(-3) = 9 + 9 = 18

b) f(0) = 0² - 3.0 = 0

c) f(3) = 3² - 3.3 = 9 - 9 = 0

d) f(4) - f(-4)/2 = 4² - 3.4 - ((-4)² - 4.(-4))/2 = 16 - 12 - (16 + 16)/2 = 4 - 16 = -12