Question

va rog am nevoie ne aparat dau coroana ❤️​

Answer 1

Răspuns:

Explicație pas cu pas:

3.

2x + 1 = -1; 1; -7; 7

2x = -2; 0; -8; 6

x = -1; 0; -4; 3

A = {-4, -1, 0, 3}

_______________

2x - 3 = -1; 1; -3; 3; -9; 9

2x = 2; 4; 0; 6; -6; 12

x = 1; 2; 0; 3; -3; 6

B = {-3; 0; 1; 2; 3; 6}

___________________

A U B = {-4,-3, -1, 0, 1, 2, 3, 6}

A ∩ B = {0; 3}

__________________________________

4.

I2x - 3I = 11

2x - 3 = 11

2x = 11 + 3 = 14

x = 14 : 2 = 7

2x - 3 = -11

2x = -11 + 3 = -8

x = -8 : 2 = -4

x = {-4; 7}