Question

va rog sa ma ajutati la 5 6 7
urgent va rog! ​

Answer 1

Explicație pas cu pas:

5.

2x +1 = 2, 2x = 2-1, 2x = 1, x = 1/2 nu este natural

2x + 2 = 2, 2x = 2-2, 2x = 0, x = 0

2x +3 = 2, 2x = 2-3, 2x = - 1, x = - 1/2 nu este natural

6.

A= { 0,1,2,3,4,5,6,7}

B = { 4,5,6,7,8,9}

C = { 8,9,10,11,12,13}

D = { 11,12,13,14,15,16,17,18,19,20,21,22}

E = { 1,2,3,6,9,18}

F = { 1,3,5,7,9,11}

7.

a) { 0,2,4,6,8,10,12}

b) { 1,3,5,7,9}

c) {10,20,30,40,50,60,70,80,90}

d) { 25, 50, 75, 100}

e) { 111, 222, 333, 444, 555, 666, 777, 888, 999}