we put \(\left(a,b\right)=d\)  inferred \(a=dm;b=d.n\) so in that \(\left(m,n\right)=1.\)

suppose \(a\le b\) then \(m\le n.\)

we have: \(ab=dm.dn=d^2m.n.\)

              \(\left[a,b\right]=\dfrac{ab}{\left(a;b\right)}=\dfrac{d^2m.n}{d}=d.m.n\)

According to the post: \(\left[a,b\right]=210\) so \(d.m.n=210.\)

In that, \(d=\dfrac{ab}{\left[a,b\right]}=\dfrac{2940}{210}=14\) . So \(mn=\dfrac{210}{10}=15\)

We have following list:

find 2 natural a and b with product of 2940 and smallest multiple is 210

sorro mk dịch sang t.v nên nó không ra t.a