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23.Daca=a•b={(2^5•8^6):[(16^4)^5:(32^3)^4]}:9
25.Calculați:A={10,11,12,13},B={9,10,11},C={12,13,14},calculați:
a)AUB=
b)BUC=
c)A-B=
d)B-C=
e)A-(AUC)=
f)(AUB)-C=

Răspuns :

Slavitescudora
23. a×b= {(2^5×2^18):[(2^16)^5:(32^12)]}:9
a×b={2^23:[2^80:2^60]}:9
a×b={2^23:2^20}:9
a×b=2^3:9
a×b=8:9 nu sunt sigura ca este asa, dar am incercat

25.a) AUB={10,11,12,13,9}
b) BUC={9,10,11,12,13,14}
c) A-B={12,13}
d) B-C={9,10,11}
e) A-(AUC) =A-{10,11,12,13,14}={14}
f) {10,11,12,13,9}-C={10,11,9}

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