Question

cho a=220, b=240, c=300. Tìm a)ƯCLN(a,b,c)  b)BCNN(a,b,c)  c)ƯC(a,b,c)   d)BC(A,B,C)

 

Answer 1

a: UCLN(a,b,c)=20

b: BCNN(a,b,c)=13200

c: ƯC(a,b,c)={1;2;4;5;10;20}

d: BC(a,b,c)={13200; 26400; ...}

Answer 2

Ta có:

a = 220 = 2² . 5 . 11

b = 240 = 2⁴ . 3 . 5

c = 300 = 2² . 3 . 5²

a) ƯCLN(a, b, c) = 2² . 5 = 20

b) BCNN(a, b, c) = 2⁴ . 3 . 5² . 11 = 13200

c) ƯC(a, b, c) = Ư(20) = {1; 2; 4; 5; 10; 20}

d) BC(a, b, c) = B(13200) = {0; 13200; 26400;...}