Question

(UNAERP SP/2006) Analisando as expressões:

I. [(+2)(– 3/4):(–2/3)]

II. (+2–3+1):(–2+2)

III. (+4–9):(–5+3)

IV. (2–3+1):(–7)

podemos afirmar que zero é o valor de:

A) I e III
B) IV
C) II e IV
D) I, II e IV

Answer 1

Resposta:

I. [(+2)(– 3/4):(–2/3)] = 0

[(1,5 : - 2/3)] = 0

2,25 ≠ 0  

 

II. (+2–3+1):(–2+2) = 0

0 / 0 = 0

III. (+4–9):(–5+3) = 0

-5 / -2 = 0

2,5 ≠ 0

IV. (2–3+1):(–7) = 0

0 / -7 = 0

resp: letra c) ll e iV