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care este produsul a×b×c,stind ca: a+b=21, b+c=5, a+c=22?


Răspuns :

a+b=21; b+c=5; a+c=22; 2(a+b+c)=22+5+21=48; a+b+c=48/2=24; c=24-21=3; a=24-5=19; b=24-22=2; a•b•c=3•2•19=6•19=114