Question

18. Fie A = {x € N* | x2 < 25} şi B = {x | x < 27}. Aflaţi:
a) A şi B;
b) A UB, A n B, A-B, B-A.​

Answer 1

A={12,22}

B=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20.....27}

AUB={0,1,2,3,4,5.............27}

AnB={12,22}

A/B=ø

B/A={0,1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21,23,24,25,26,27}

Answer 2

Răspuns:

A={0,1,2,3,4,5}

B={0,1,2,3}

A U B= {0,1,2,3,4,5}

A (Aici la intersecție pui U întors) B={0,1,2,3}

A-B={4,5}

B-A={O} (mulțimea viza tai acel o cu o linie \ )