Question

Fie A= { x∈N°/x<6} , unde x este numar natural nenul
B = {x∈N/3<x≤9)      C= {3,4,5,6,9 } CALCULATI:

A∪B C∪B
A∩B A∩B∩C
A-B
A∪B∪C DAU 15 PUNCTE!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

::::::::::::::::::::::::::::::::::: A-B={1,2,3}

Answer 2

A={1,2,3,4,5}
B={4,5,6,7,8,9}
C={3,4,5,6,9}

AUB={1,2,3,4,5,6,7,8,9}
CUB={3,4,5,6,7,8,9}
A∩B={4,5}
A∩B∩C={4,5}
A-B={1,2,3}
AUBUC={1,2,3,4,5,6,7,8,9}