Question

tìm BC: 

BC (30,105)

BC(68,208,100)

BC(98,72,42)

giải rõ ra nhé 

Answer 1

Viết cái đề còn dell hiểu thì nhờ giải kiểu gì

Answer 2

đề là tìm bội chung

Answer 3

BC30;105BC30;105

30=2.3.5;105=3.5.730=2.3.5;105=3.5.7

BCNN30;105=2.3.5.7=210BCℕN30;105=2.3.5.7=210

⇒BC30;105=B210={0;210;420;..........}⇒BC30;105=B210={0;210;420;..........}

BC84;108BC84;108

84=22.3.7;108=22.3384=22.3.7;108=22.33

BCNN30;105=22.33.7=756BCℕN30;105=22.33.7=756

⇒BC84;108=B756={0;756;...........}⇒BC84;108=B756={0;756;...........}

BC98;72;42BC98;72;42

98=2.72;72=23.32;42=2.3.798=2.72;72=23.32;42=2.3.7

BCNN98;72;42=23.32.72=3528BCℕN98;72;42=23.32.72=3528

⇒BC98;72;42=B3528={0;3528;............}⇒BC98;72;42=B3528={0;3528;............}

BC68;208;100BC68;208;100

68=22.17;208=24.13;100=22.5268=22.17;208=24.13;100=22.52

BCNN68;208;100=24.13.17.52=88400BCℕN68;208;100=24.13.17.52=88400

⇒BC68;208;100=B88400={0;88400;...........}

Answer 4

mình tưởng chỉ tìm bội chung thôi mà