i: \(18=3^2\cdot2\)

=>\(Ư\left(18\right)=\left\{1;-1;2;-2;3;-3;6;-6;9;-9;18;-18\right\}\)

k: \(24=2^3\cdot3\)

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

l: \(12=2^2\cdot3\)

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

m: \(27=3^3\)

=>\(Ư\left(27\right)=\left\{1;-1;3;-3;9;-9;27;-27\right\}\)

a) Ư(12²) = Ư(144) = {1; 2; 3; 4; 6; 8; 9; 12; 16; 18; 24; 32; 48; 72; 144}

b) Ư(18²) = Ư(324) = {1; 2; 3; 4; 6; 9; 12; 18; 27; 36; 54; 81; 108; 162; 324}

c) Ư(24²) = Ư(576) = {1; 2; 3; 4; 6; 8; 9; 12; 16; 18; 24; 32; 36; 48; 64; 72; 96; 144; 192; 288; 576}

d) Ư(32²) = Ư(1024) = {1; 2; 4; 8; 16; 32; 64; 128; 256; 512; 1024}

;((

\(Ư\left(144\right)=\left\{1,2,3,4,6,8,9,12,16,18,24,36,48,72,144\right\}\)

\(Ư\left(324\right)=\left\{1,2,3,4,6,9,12,18,27,36,54,81,108,162,324\right\}\)

\(Ư\left(576\right)=\left\{1,2,3,4,6,8,9,12,16,18,24,32,36,48,64,72,96,144,192,288,576\right\}\)

\(Ư\left(1024\right)=\left\{1,2,4,8,16,32,64,128,256,512,1024\right\}\)

\(Ư\left(1296\right)=\left\{1,2,3,4,6,8,9,12,16,24,27,36,48,54,72,81,108,144,162,216,324,432,648,1296\right\}\)

Ư(10) = { 1 ; 2 ; 5 ; 10 }

B(10) = { 0 ; 10 ; 20 ; 30 ....}

Ư(10) = {1,2,5,10}

B(10)=(0,10,20,30,40,50,...}

Đúng

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;…}

1)

\(Ư\left(6\right)=\left\{\pm1;\pm2;\pm3;\pm6\right\}\)

\(Ư\left(14\right)=\left\{\pm1;\pm2;\pm7;\pm14\right\}\)

\(Ư\left(17\right)=\left\{\pm1;\pm17\right\}\)

\(Ư\left(1\right)=\left\{\pm1\right\}\)

2)

a)

\(Ư\left(12\right)=\left\{\pm1;\pm2;\pm3;\pm4;\pm6;\pm12\right\}\)

b)

\(Ư\left(18\right)=\left\{\pm1;\pm2;\pm3;\pm6;\pm9;\pm18\right\}\)

c)

\(Ư\left(24\right)=\left\{\pm1;\pm2;\pm3;\pm4;\pm6;\pm8;\pm12;\pm24\right\}\)

\(\text{Ta có:}\)\(x>8\)\(\Rightarrow\)\(x\in\left\{12;24\right\}\)

TL

12 và 24 nha

Hok tốt

a: B(6)={6;12;18;24;...}

B(9)={9;18;27;...}

B(12)={12;24;36;...}

Ư(30)={1;-1;2;-2;3;-3;5;-5;6;-6;10;-10;15;-15;30;-30}

Ư(45)={1;-1;3;-3;5;-5;9;-9;15;-15;45;-45}

Ư(60)={1;-1;2;-2;3;-3;4;-4;5;-5;6;-6;10;-10;12;-12;15;-15;20;-20;30;-30;60;-60}

b: \(36=2^2\cdot3^2;48=2^4\cdot3\)

=>ƯCLN(36;48)=\(2^2\cdot3=12\)

\(24=2^3\cdot3;28=2^2\cdot7;36=2^2\cdot3^2\)

=>ƯCLN(24;28;36)=\(2^2=4\)

c: \(6=3\cdot2;8=2^3\)

=>BCNN(6;8)=\(2^3\cdot3=8\cdot3=24\)

\(8=2^3;9=3^2;72=2^3\cdot3^2\)

=>BCNN(8;9;72)=\(2^3\cdot3^2=72\)

d: \(15=3\cdot5;54=3^3\cdot2\)

=>BCNN(15;54)=\(3^3\cdot2\cdot5=27\cdot10=270\)

=>BC(15;54)={270;540;810;1080;...}

=>Các bội chung nhỏ hơn 1000 của 15 và 54 là 270;540;810