Question

Tim Bc cua 12 va 20

Answer 1

12=2 mũ 2 nhân 3

20=2 mũ 2 nhân 5

BCNN(12,20)=2 mũ 2 nhân 3 nhân 5 = 60

BC(12,20)=B(60)={0,60,120,180,...}

Answer 2

Giải :

\(12=2^2×3\)

\(20=2^2×5\)

BCNN(12 , 20) = 2^2 * 3 * 5 = 60 

BC(12 , 20 ) = B( 60 ) = { 0 , 60 , 120 , 180 , 240 , ........}

^^

Answer 3

Ta có:

12\(=\)2²\(\times\)3

20\(=\)2²\(\times\)5

\(\Rightarrow\)BCNN(12;20)=2²\(\times\)3\(\times\)5\(=\)60

\(\Rightarrow\)BC(12;20)\(=\){0;60;120;180;240;300;...}