Question

Stiind ca (a;b)= 9 si [a;b]= 72 determinati toate perechile de numere a si b

Answer 1

a=9a`
b=9b`
[a;b]=9*a`*b`=72 =>a`*b`=8
Prin  incercari
a`=1 =>a=9*1=9
b`=8  =>b=9*8=72
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a`=2  a=9a`=9*2=18
b`=4  b=9*4=36
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a`=8  a=72
b`=1  b=9