Question

tìm ước chung lớn nhất và tìm ước chung của nó:
90;180 và 315

Answer 1

ta có

\(90 = 5.3^2.2\)

\(180 = 5.3^2.2^2\)

\(315 = 5.3^2.7\)

\(=>ƯCLN (90,180,315) = 5.3^2 = 45\)

\(Ư(45)={1,45,3,15,5,9}\)

 

Answer 2

\(90=2.3^2.5\)

\(180=2^2.3^2.5\)

\(315=3^2.5.7\)

\(ƯCLN\left(90;180;315\right)=3^2.5=45\)

\(ƯC\left(45\right)=\left\{1;3;5;9;15;45\right\}\)

Answer 3

Answer 4

`90 = 2 . 3^2 . 5`

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

`315 = 3^2 . 5 .7`

`=> ƯCLN (90,180,315) = 3^2 . 5 = 45`

_______________________________________

`90 = { 1,2,3,5,6,9,10,15,30,45}`

`180 = { 1,2,3,4,5,6,9,10,12,15,18,20,30,36,45}`

`315 = { 1,3,5,7,9,15,21,35,45...}`

`=> ƯC ( 90,180,315) = { 1,3,5,9,15,45}`

_____________________________________________

`#BaoL i nh`

Answer 5

ta có

$90={}^{}.2$

$180={}^{}{}^{}$

$315={}^{}.7$

=>ƯCLN(90,180,315)=5.32=45=>ƯCLN(90,180,315)=5.32=45

Ư(45)=1,45,3,15,5,9