chỉ cần phân tích 2 số thành tích của thừa số nguyên tố thôi pạn

Ư(76) = { 1 ; 2 ; 4 ; 19 ; 38 ; 76 }

Ư(92) = { 1 ; 2 ; 4 ; 23 ; 46 ; 92 } 

nếu bạn thấy đúng thì k đúng nha

a: \(x+4=9^2\)

=>x+4=81

=>x=81-4=77

b: \(132-3^{x-2}=51\)

=>\(3^{x-2}=132-51=81\)

=>x-2=4

=>x=6

c: \(x\inƯ\left(45\right)\)

=>\(x\in\left\{1;3;5;9;15;45\right\}\)

mà x>=5

nên \(x\in\left\{5;9;15;45\right\}\)

d: \(x-2\in B\left(10\right)\)

=>\(x-2\in\left\{...;250;260;270;280;290;...\right\}\)

=>\(x\in\left\{...;252;262;272;282;292;...\right\}\)

mà 252<=x<=283

nên \(x\in\left\{252;262;272;282\right\}\)

haizz

bạn chỉ cần tìm xem 65 , 2⁵ = 32 , 3² x 7 = 9 x 7 = 63 chia hết cho những số nào là ra được mà !

(Ư)65=1,5,13,65                                                                                                                                                                                                  (Ư)2^5=(Ư)32=1,2,4,8,18,32                                                                                                                                                                               (Ư)3^2*7=(Ư)63=1,3,21,63

(U)65={1;5;13:65}

(U)2⁵={1;2;4;8;16;32}

(U)3².7={1;3;9;7;63}

Ư(4)= {-4;-2;-1;1;2;4}

Ư(-3)= {-3;-1;1;3}

Ư(12)={-12;-6;-4;-3;-2;-1;1;2;3;4;6;12}

Ư(-8)={-8;-4;-2;-1;1;2;4;8}

Ư(-6)={-6;-3;-2;-1;1;2;3;6}

Ư(-20)={-20;-10;-5;-4;-2;-1;1;2;4;5;10;20}

Ư(-10)={-10;-5;-2;-1;1;2;5;10}

Ư(-16)={-16;-8;-4;-2;-1;1;2;4;8;16}

;((

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

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

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

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

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

\(Ư\left(2304\right)=\left\{1,2,3,4,6,8,9,12,16,18,24,32,48,64,72,96,128,144,192,256,288,384,576,768,1152,2304\right\}\)

\(Ư\left(2500\right)=\left\{1,2,4,5,10,20,25,50,100,125,250,500,625,1250,2500\right\}\)

\(Ư\left(10000\right)=\left\{1,2,4,5,8,10,16,20,25,40,80,100,125,200,250,400,500,625,1000,1250,2000,2500,5000,10000\right\}\)

Ư( - 8) = { -8;-4;-2;-1;1;2;4;8;}

Ư( -10 ) = { -10;-5;-2;-1;1;2;5;10 }

B(-4)= { -16 ; -12 ; -8 ; -4 ;0 }

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

Ư(-8)=(-1;1;-2;2;-4;4;-8;8)

Ư(-10)=(-1;1;-2;2;-5;5;-10;10)

B(-4)=(-4;4;-8;12)

Ư(15)=(-1;1;-2;2;-3;3;-5;5;-15;15)

Ư( - 8) = { -8;-4;-2;-1;1;2;4;8;}

Ư( -10 ) = { -10;-5;-2;-1;1;2;5;10 }

B(-4)= { -16 ; -12 ; -8 ; -4 ;0 }

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

Ư(2) = {1 ; 2}

Ư(3) = {1; 3}

Ư(4) = {1 ; 2 ; 4}

Ư (5) = {1 ; 5}

a)U(2)={1;2}

b)U(3)={1;3}

c)U(4)={1;2;4}
d)U(5)={1;5} tick nha CHU MINH NGỌC

Ư(2) = { 1 ; 2 } 

Ư(3) = { 1 ; 3 }

Ư(4) = { 1 ; 2 ; 4 } 

Ư(5) = { 1 ; 5 }