Question

Determinati mulțimile care îndeplinesc simultan conditiile: a) AUB={x€N|3<_x+2<14}, b) AnB={x€N|x este nr. impar, x<12}, c) A-B={x€N|2x=8 sau x:3=2}.

Answer 1

A U B = {1,2,3,4,5,6,7,8,9,10,11}

A n B = {1,3,5,7,9,11}

A-B ={4,6}

A={1,3,5,7,9,11,2,8,10}

B={1,3,5,7,9,11,4,6}