a, Ư \(\left(a\right)=\left\{1;7;11;77\right\}\)

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

c, Ư \(\left(c\right)=\left\{1;3;5;9;15;45\right\}\)

a) \(a=7\cdot11\Leftrightarrow a=77\)

\(\RightarrowƯ\left(a\right)=Ư\left(77\right)\)

\(Ư\left(a\right)=\left\{1;7;11;77\right\}\)

b) \(b=2^4\Leftrightarrow b=16\)

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

c) \(c=3^2\cdot5\Leftrightarrow c=45\)

\(\RightarrowƯ\left(c\right)=Ư\left(45\right)=\left\{1;3;5;9;15;45\right\}\)

a, a = 7.11

a=77

Ư(a) =1,11,77

    b, b = 2⁴ 

b=16

Ư(b)=1,2,4,8,16

   c, c = 3² .5

c=9.5

c=45

Ư(c)=1,3,5,9,15,45

bạn làm thiếu ở câu a =)

\(Ư\left(a\right)=\left\{\pm1;\pm7;\pm11;\pm77\right\}\)

\(Ư\left(b\right)=\left\{\pm1;\pm2;\pm4;\pm8;\pm16​​\right\}\)

\(Ư\left(c\right)=\left\{\pm1;\pm3;\pm5;\pm9;\pm15;\pm45​​\right\}\)

a) a = 7 . 11 

=> Ư(a) = { 1 ; 7 ; 11 ; 77 }

b) b = 2⁴

=> Ư(b) = { 1 ; 2 ; 4 ; 8 ; 16 }

c) c = 3² . 5

=> Ư(c) = { 1 ; 3 ; 5 ; 9 ; 15 ; 45 }

a/Ư(a)={1;5;13;65}

b/Ư(b)={1;2;4;8;16;32}

c/Ư(c)={1;3;7;9;21;63}

a)a=45

Ư(45)=\(\hept{\begin{cases}\\\end{cases}0;45;90;...}\)

b)b=32

Ư(32)=\(\hept{\begin{cases}\\\end{cases}0;32;64;96;...}\)

c)c=9.7=63

Ư(63)=\(\hept{\begin{cases}\\\end{cases}}0;63;126;252;...\)

a , a = 7 x 11 = 77 
=> Ư(77) = { 1 ; 7 ; 11 ; 77 }
b, b = 2⁴ = 16 
=> Ư(16 ) = { 1; 2; 4; 8;16 }
c, c = 3² x 5 = 45 
=> Ư(45 ) = { 1 ; 3 ; 5 ; 9  ; 15 ; 45 } 

a, a = 7.11 = 77

Ư(77) = \(\left\{1;7;11;77\right\}\)

b, b = 2⁴ = 16

Ư(16) = \(\left\{1;2;4;8;16\right\}\)

c, c = 3².5 = 45

Ư(45) = \(\left\{1;3;5;9;15;45\right\}\)