Question

considere F uma função de R dada por F (×)=2×2-3×+2 calcule
a)F (-1) b)F (1) c)F (0) d) F (2) e)F (1_3

Answer 1

f(x) = 2x² - 3x + 2

a)
f(-1) = 2 * (-1)² - 3 * (-1) + 2
f(-1) = 2 * 1 + 3 + 2
f(-1) = 2 + 5
f(-1) = 7

b)
f(1) = 2 * (1)² - 3 * (1) + 2
f(1) = 2 * 1 - 3 + 2
f(1) = 2 - 1
f(1) = 1

c)
f(0) = 2 * (0)² - 3 * (0) + 2
f(0) = 2 * 0 - 0 + 2
f(0) = 0 + 2
f(0) = 2

d)
f(2) = 2 * (2)² - 3 * (2) + 2
f(2) = 2 * 4 - 6 + 2
f(2) = 8 - 4
f(2) = 2

e)
f(1/3) = 2 * (1/3)² - 3 * (1/3) + 2
f(1/3) = 2 * 1/9 - 1 + 2
f(1/3) = 2/9 + 1
f(1/3) = (2 + 9) / 9
f(1/3) = 11 / 9