Question

BCNN (42; 70; 180) laø:

Answer 1

Ta có:
`42=2.3.7`

`70=2.5.7`

`180=2^2 .3^2 .5`

`=> BCNN(42,70,180)=2^2 .3^2 .5.7=1260`

Answer 2

đăng ròi mef

Answer 3

chịu

Answer 4

`42 = 2 xx 3 xx 7`

`70 = 7 xx 2 xx 5`

`180 = 2 xx 2 xx 5 xx 3 xx 3`

`=> [42, 70, 180] = 7 xx 2^2 xx 3^2 = 7 xx 4 xx 9 xx 5 = 1260`

Answer 5