Question

tim x,y biet x.y=4320,BCNN(x,y)=4320

Answer 1

ta có x.y=BCNN(x,y) nhân UCLN (x,y) do đó UCLN(x,y)=1

mà \(x.y=4320=2^5.3^3.5\)

do đó ta có 8 khả năng sau \(\left(x,y\right)\in\left\{\left(1,4320\right),\left(4320,1\right),\left(2^5,3^3.5\right),\left(3^3.5,2^5\right),\left(2^5.3^3,5\right),\left(5,2^5.3^3\right),\left(3^3,2^5.5\right),\left(2^5.5,3^3\right)\right\}\)