Question

3) Sendo a função f(x) = x 2 -7x + 5, determine os valores de: a) f(-3) = b) f(-1) = c) f( 0) = d) f( 2) = e) f( 3) =

Answer 1

Resposta:

a)

f(-3) = (-3)² - 7.(-3) + 5

f(-3) = 9 + 21 + 5

f(-3) = 35

b)

f(-1) = (-1)² - 7.(-1) + 5

f(-1) = 1 + 7 + 5

f(-1) = 13

c)

f(0) = 0² - 7.0 + 5

f(0) = 5

d)

f(2) = 2² - 7.2 + 5

f(2) = 4 - 14 + 5

f(2) = - 5

e)

f(3) = 3² - 7.3 + 5

f(3) = 9 - 21 + 5

f(3) = -7