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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 (12) = {1;2;3;4;6;12}
Ư (16) = {1;2;4;8;16}
Ư (24) = {1;2;3;4;6;8;12;24}
ƯC (12; 16; 24) = {1;2;4}
b) ƯC (5; 15; 35) = {1;5}
c) BC (8; 12; 24) = {0;24;48}
d) BC (5; 15; 35) = {0;105;210;…}
a) Ư(8) = {1;2;4;8}; Ư(12) = {1;2;3;4;6;12} => ƯC(8;12) = {1;2;4;}
b) Ư(24) = {1;2;3;4;6;8;12;24}; Ư(32) = {1;2;4;8;16;32} => ƯC(24; 32) = {1;2;4;8;}
c) Ư(7) = {1;7} ; Ư(10) = {1;2;5;10} => ƯC(7;10) = {1}
d) 8 = 23; 10 = 2.5 => BCNN (8;10) = 23.5 = 40 => BC(8;10) = B(40) = {0;40;80;...}
e) 25 = 52 => BCNN(2;3;25) = 2.3.52 = 150 => BC (2;3;25) = B(150) = {0;150; 300; ...}
2) N = {0;1;2;3;...}; N* = {1;2;3;....} => N giao N* = {1;2;3;...} = N*
a) Ư(8) = {1;2;4;8}; Ư(12) = {1;2;3;4;6;12} => ƯC(8;12) = {1;2;4;}
Vâu b,c,d,e tương tự nha bn
2) N = {0;1;2;3;...}; N* = {1;2;3;....} => N giao N* = {1;2;3;...} = N*
hok tốt
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: \(Ư\left(20\right)=\left\{1;2;4;5;10;20\right\}\)
\(Ư\left(32\right)=\left\{1;2;4;8;16;32\right\}\)
\(ƯC\left(20;32\right)=\left\{1;2;4\right\}\)