Question

giúp mk nha

Answer 1

Bài 1 : 

36 = 2² . 3²

60 = 2² . 3 . 5

72 = 2³ . 3² 

ƯCLN(36,60,72) = 2² . 3 = 12

ƯC(36,60,72) = Ư(12) = 1,2,3,4,6,12

b) 90 = 2 . 3² . 5

126 = 2 . 3² .7

ƯCLN(90,126) = 2.3² = 18

ƯC(90,126) = Ư(18) = 1,2,3,6,9,18

 

Answer 2

Bài 2 : 

a) 8 = 2³

12 = 2² . 3

BCNN(8,12) = 2³ . 3 = 24

BC(8,12) = B(24) = 0,24,48,.....

b) 9 = 3²

60 = 2² . 3 . 5

180 = 2² . 3² . 5

BCNN(9,60,180) = 2² . 3² . 5 = 180

BC(9,60,180) = B(180) = 0,180,360,....