ƯC(12, 18) {1, 3, 2, 6, -1, -2, -3, -6}
ƯC(-15, 20) {1,-1,5,-5}
chúc bạn học tốt nha
\(ƯC\left(12;18\right)=\left\{6\right\}\)
\(ƯC\left(-15;20\right)=\left\{5\right\}\)
1 ) Ư C ( 12,18 )
TA CÓ :
12 = 22 . 3
18 = 2 . 32
=> ƯCLN ( 12,18 ) = 2 . 3 = 6
=> Ư C ( 12,18 ) = Ư ( 6 ) = { 1 ; 2 ; 3 ; 6 }
Vậy Ư C ( 12,18 ) = { 1 ; 2 ; 3 ; 6 }
\(ƯC\left(12;18\right)=\left(1;-1;2;-2;3;-3;6;-6\right)\)
\(ƯC\left(-15;20\right)=\left(1;-1;-5;5\right)\)
Mình nhầm ƯCLN
Xin lỗi \(Ư\left(12\right)=\left\{\pm1;\pm2;\pm3;\pm4;\pm6;\pm12\right\}\)
\(Ư\left(18\right)=\left\{\pm1;\pm2;\pm3;\pm6;\pm9;\pm18\right\}\)
\(\RightarrowƯC\left(12;18\right)=\left\{\pm1;\pm2;\pm3;\pm6\right\}\)
Còn lại làm tương tự
\(ƯC\left(-15;20\right)=\left\{\pm1;\pm5\right\}\)
