Question

Fie multimile:
a)
A={x apartine N* | x mai mic sau egal cu 4}
B={x apartine N | 2 mai mic sau egal x mai mic sau egal 3}
C={x apartine N* | 3x+1<10}
b)Enumerati elementele multimilor A B C
Plss help me !

Answer 1

A={1,2,3,4}
2≤ decat X---> x=2,3,4,5,6, etc
X≤ decat 3---> x=0,1,2,3           B={2,3}
3x+1<10
3x<9
x<9:3
x<3   => x=1,2,3             C={1,2,3}