Question

Tìm ƯCLN (90;105).Từ đó tìm ƯC(90;105)

Answer 1

Tìm ƯCLN (90;105)

90 = 5.3².2

105 = 5.3.7

ƯCLN (90;105) = 5.3 = 15

ƯC (90;105) = Ư(15) = {1,3,5,15}

Answer 2

Ta có :

90 = 2 x 3³ x 5

105 = 3 x 5 x7

=>ƯCLN (90;105) = 3 x 5 = 15

=> ƯC(90;105)∈Ư(15)∈{1;3;5;15}