Question

B={x apartine N | 5 mai mic sau egal decat x-2 mai mic sau egal decat 9}
C={x apartine N | 13 mai mic sau egal decat 2x-1 mai mic sau egal decat 21}

Answer 1

7 mai mic egal x mai mic egal 11
B= {7,8,9,10,11}

Answer 2

B={7, 8, 9, 10, 11}
C={7, 8, 9, 10, 11}