Đáp án là A

Ta có: Ư(6) = {1; 2; 3; 6}; Ư(20) = {1; 2; 4; 5; 10; 20}

Vậy ƯC(6, 20) = {1; 2}

Đáp án cần chọn là: A

Ta có:

Ư(6)={1,2,3,6} và Ư(20)={1,2,4,5,10,20}

Vậy ƯC(6,20)={1,2}

a) Ư(6) = {1;2;3;6}

Ư(9) = {1;3;9}

ƯC(6,9) = {1;3}

b) Ư(7) = {1;7}

Ư(8) = {1;2;4;8}

ƯC(7;8) = {1}

c) ƯC(4;6;8) = { 1;2} 

cac cau hoc lop may

Bài dễ thế này mà ko làm dc ngu thế 

Tự đi mà làm

FUCK YOU

a) Ư (6) = {1; 2; 3; 6}

Ư (9) = {1, 3, 9}

ƯC (6, 9) = {1; 3}.

b) Ư (7) = {1; 7}

Ư (8) = {1; 2; 4; 8}

ƯC (7, 8) = {1}.

c) ƯC (4, 6, 8) = {1, 2}.

a) Ư (6) = {1; 2; 3; 6}, Ư (9) = {1, 3, 9}, ƯC (6, 9) = {1; 3}.

b) Ư (7) = {1; 7}, Ư (8) = {1; 2; 4; 8}, ƯC (7, 8) = {1}.

c) ƯC (4, 6, 8) = {1, 2}.

a: \(Ư\left(16\right)=\left\{1;2;4;8;16\right\}\)

\(Ư\left(24\right)=\left\{1;2;3;4;6;8;12;24\right\}\)

\(ƯC\left(16;24\right)=\left\{1;2;4;8\right\}\)

b: \(Ư\left(20\right)=\left\{1;2;4;5;10;20\right\}\)

\(Ư\left(32\right)=\left\{1;2;4;8;16;32\right\}\)

\(ƯC\left(20;32\right)=\left\{1;2;4\right\}\)

a) Ư (15) = {1;3;5;15}

Ư (27) = {1;3;9;27}

ƯC (15; 27) = {1;3}

b) ƯC (16; 20; 30) = {1;2}

c) BC (25; 39) = {0;975;1950;…}

d) BC (100; 120; 140) = {0;4200;…}

a)Ư(6)={1;2;3;6}

Ư(9)={1;3;9}

Ư(6;9)={1;3}

b)Ư(7)={1;7}

Ư(8)={1;2;4;8}

ƯC(7;8)=1

c)Ư(4)={1;2;4}

Ư(6)={1;2;3;6}

Ư(8)={1;2;4;8}

ƯC(4;6;8)={1;2

ƯC

Ư(6)={1;2;3;6}

Ư(9)={1;3;9}

Ư(6;9)={1;3}

b)Ư(7)={1;7}

Ư(8)={1;2;4;8}

ƯC(7;8)=1

c)Ư(4)={1;2;4}

Ư(6)={1;2;3;6}

Ư(8)={1;2;4;8}

ƯC(4;6;8)={1;2)

a,ƯC(6,9)=(18,36,54,72,...)

\(\text{Ư}\left(6\right)=\left\{1;2;3;6\right\}\)

\(\text{Ư}\left(9\right)=\left\{1;3;9\right\}\)

\(\text{Ư}C\left(6;9\right)=\left\{3\right\}\)

a)  Ư(6) ={1;2;3;6}    Ư(9)= {1;3;9}       ƯC(6,9) ={1;3}

b)  Ư(7) ={1;7}     Ư(8) = {1;2;4;8}      ƯC(7,8) = {1}

c)  ƯC(4;6;8)={1;2}

k mik nha