Question

fie multimile A={xeZ/ 7/2x+1eZ} si B={xeZ/ 9/2x-3}. Calculati A,B,AUB,AUB.

Answer 1

Răspuns:

Explicație pas cu pas:

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}

_____________

AUB = {-4; -3; -1; 0; 1; 2; 3; 6}

A∩B = {0; 3}