Question

Determinati numerele a si b stiind ca sunt direct proportionale cu 3 si 5 si (a,b) + [a,b]=240

Answer 1

{a, b} dp {3, 5}

a/3=b/5=k

a=3k
b=5k

(a,b)=k

[a,b]=15k

k+15k=16k=240

k=15

a=3×15=45

b=5×15=75