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a) 16 = 2⁴
24 = 2³.3
⇒ ƯCLN(16; 24) = 2³ = 8
⇒ ƯC(16; 24) = Ư(8) = {1; 2; 4; 8}
b) 84 = 2².3.7
108 = 2².3³
⇒ BCNN(84; 108) = 2².3³.7= 756
⇒ BC(84; 108) = B(756) = {0; 756; 1512; ...}
a, Ta có : \(Ư\left(16\right)=1;2;4;8;16\) và \(Ư\left(24\right)=1;2;3;4;6;8;12;24\)
\(\RightarrowƯC\left(16;24\right)=1;2;4;8\)
b, Ta có : \(\hept{\begin{cases}Ư\left(60\right)=1;2;3;4;5;6;10;12;15;20;20;60\\Ư\left(90\right)=1;2;3;5;6;9;10;15;18;30;45;90\end{cases}}\)
\(\RightarrowƯC\left(60;90\right)=1;2;3;5;6;15;30\)
c, Ta có : \(\hept{\begin{cases}Ư\left(18\right)=1;2;3;6;9;18\\Ư\left(30\right)=1;2;3;5;6;10;15;30\\Ư\left(42\right)=1;2;3;6;7;14;21;42\end{cases}}\)\(\RightarrowƯC\left(18;30;42\right)=1;2;3;6\)
d,Ta có : \(\hept{\begin{cases}Ư\left(26\right)=1;2;13;26\\Ư\left(39\right)=1;3;13;39\\Ư\left(48\right)=1;2;4;6;8;12;16;24;48\end{cases}}\)\(\RightarrowƯC\left(26;39;48\right)=1\)
\(a,ƯC\left(16,24\right)=Ư\left(8\right)=\left\{\pm1;\pm2;\pm4;\pm8\right\}\\ b,BC\left(84,108\right)=B\left(756\right)=\left\{0;756;1512;2268;...\right\}\\ c,ƯC\left(36,48,120\right)=Ư\left(12\right)=\left\{\pm1;\pm2;\pm3;\pm4;\pm6;\pm12\right\}\\ d,BC\left(42,64,70\right)=B\left(6720\right)=\left\{0;6720;13440;20160;...\right\}\)
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: \(Ư\left(20\right)=\left\{1;2;4;5;10;20\right\}\)
\(Ư\left(32\right)=\left\{1;2;4;8;16;32\right\}\)
\(ƯC\left(20;32\right)=\left\{1;2;4\right\}\)
24 = 23.3; 60 = 22.3.5
ƯCLN(24; 60) = 22.3 = 12
35 = 5.7; 7 = 7
ƯCLN(35; 7) = 7
24 = 23.3; 23 = 23
ƯCLN(24; 23) =1
35 = 5.7
7 = 7
1 =1
ƯCLN(35; 7; 1) =1
12 = 22 . 3
30 = 2 . 3 . 5
ƯCLN ( 12 ; 30 ) = 2 . 3 = 6
8 = 23
9 = 32
ƯCLN ( 8 ; 9 ) = 1
8 = 23
12 = 22 . 3
15 = 3 . 5
ƯCLN ( 8 ; 12 ; 15 ) = 1
24 = 23 . 3
16 = 24
8 = 23
ƯCLN ( 24 ; 16 ; 8 ) =23 = 8
bằng 8 bạn nhé
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