Question

1.Em hãy tìm ƯC(27,45) thông qua ƯCLN(27,45).

2.Tìm:

a) ƯCLN(1,8);

b) ƯCLN(8,1,12);

c) ƯCLN(24,72)

d) ƯCLN(24,84,180).

3.Tìm ƯC(24,36) theo hai cách khác nhau

Answer 1

2.

a.1

b.1

c.24

d.12

Answer 2

1.27=3³
   45=3².5
   ƯCLN(27,45)=3²=9
   ƯC(27,45)={1,3,9}
3.C₁:ƯC(24)={1,2,3,4,6,8,12,24}
        ƯC(36)={1,2,3,4,6,9,12,18,36}
=>ƯC(24,36)={1,2,3,4,6,12}
   C₂:24=2³.3
        36=2².3²
=>ƯCLN(24,36)=2².3=12
=>ƯC(24,36)={1,2,3,4,6,12}

 

Answer 3

2.

a.1

b.1

c.24

d.12