Question

tim UCLN cua;

a   42 va 58

b   18;30;42

c   26;39;48

d    85;161 hay tra loi giup minh

Answer 1

a

42=2.3.7

58=2.29

UCLN(42;58)=2

b

18=2.3^2

30=2.3.5

42=2.3.7

UCLN(18;30;42)=2.3=6

c

26=2.13

39=3.13

48=2^4.3

UCLN(26;39;48)=1

d

85=5.17

161=7.23

UCLN(85;161)=1

Answer 2

a )

42=2.3.7

58=2.29

=> ƯCLN(42,58)=2

b)

18=2.3^2

30=2.3.5

42=2.3.7

=> ƯCLN(18,30,42)=2.3=6

c)

26=2.13

39=3.13

48=2^4.3

=> ƯCLN(26,39,48)=1

d)

85=5.17

161=7.23

=> ƯCLN(85,161)=1