Question

Ajutor,vă rog,dau coroană,promit! Ex:6,7

Answer 1

Răspuns:

Explicație pas cu pas:

6.

n = 4/3 - 4/3 *[4/3 - (3/9)^2] : 44/9

= 4/3 - 4/3*(4/3 - 1/9) * 9/44

= 4/3 - 4/3*(12/9 - 1/9)*9/44

= 4/3 - 4/3*11/9*9/44

= 4/3 - 1/3 = 3/3 = 1, numar natural

7.

a)

x + 3 = 7 ⇒ x = 7 - 3 = 4

x + 3 = -7 ⇒ x = -7 - 3 = -10

x = {-10, 4}

b)

-4 ≤ 3y - 2 ≤ 4

-2 ≤ 3y ≤ 6

-2/3 ≤ y ≤ 2

x = {0, 1, 2}