Giúp mình với hứa cho 5 sao

`a)`

Ta có`:`

`14=2.7`

`35=5.7`

`BCN``N(14,35)=2.5.7=70`

`BC(14,35)={0;70;140;210;280;350;...}`

`b)`

Ta có`:`

`48=2^4 . 3`

`54=2 . 3^3`

`BCN``N(48,54)=2^4 . 3^3 =432`

`BC(48,54)={0;432;864;1296;...}`

`c)`

Ta có`:`

`12=2^2 . 3`

`20=2^2 . 5`

`36=2^2 . 3^2`

`BCN``N(12,20,36)=2^2 . 3^2 . 5=180`

`BC(12,20,36)={0;180;360;540;720;...}`