Question

BCNN (42; 70; 180) laø:

Answer 1

\(1260\)

Answer 2

Tham Khảo :

Answer 3

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 4

Ta có :

\(42=2\cdot3\cdot7\\ 70=2\cdot5\cdot7\\ 180=2^2\cdot3^2\cdot5\\ \Rightarrow BCNN\left(42;70;180\right)=2^2\cdot3^2\cdot5\cdot7=1260\)

Answer 5

Ta có: \(42=2.3.7\)

          \(70=2.5.7\)          

          \(180=2^2.3^2.5\)

\(\Rightarrow BCNN\left(42;70;180\right)=2^2.3^2.5.7\)

                                            \(=1260.\)

Vậy \(BCNN\left(42;70;180\right)\) là \(1260\).