Question

dau coroană toate 3 exerciții urgent ​

Answer 1

Răspuns:

Explicație pas cu pas:

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

x=0,1,2,3,4,5; y=1,2,3,4,5,6 (x+1)=>B={1,2,3,4,5,6}

AUB={0,1,2,3,4,5,6}   A-B={0}   B-A={6}

7.A={0,1,2,3,4}

x=0,1,2,3,4; y=2,3,4,5,6=>B={2,3,4,5,6}

A intersectat cu B={2,3,4}

AUB={0,1,2,3,4,5,6}   A-B={0,1}   B-A={5,6}

8.x=1+2,1+3,1+4,3+2,3+3,3+4,5+2,5+3,5+4=>x=3,4,5,6,7,8,9

C={3,4,5,6,7,8,9}, cardinalul lui C fiind 7