Question

Dada a função definida pela lei f(x) = x² - 5x +6 com x real, determine:

a) f(0) =
b) f(2) =
c) f(3) =
d) f(5) =
e) f(5 sobre 2) =​

Answer 1

Resposta:

a) f(0) = 6

b) f(2) = 0

c) f(3) = 0

d) f(5) = 6

e) f(5/2) = -1/4 ou -0,25.

Explicação passo-a-passo:

a) f(0) = 0² - 5.0 + 6 = 6

b) f(2) = 2² - 5.2 + 6

f(2) = 4 - 10 + 6

f(2) = -6 + 6 = 0

c) f(3) = 3² - 5.3 +6

f(3) = 9 - 15 + 6

f(3) = -6 + 6 = 0

d) f(5) = 5² - 5.5 +6

f(5) = 25 - 25 +6

f(5) = 0 + 6 = 6

e) f(5/2) = (5/2)² - 5. 5/2 + 6

f(5/2) = 25/4 - 25/2 + 6

f(5/2) = -25/4 + 6

f(5/2) = -1/4