Question

giúp mik bài 9 với

Answer 1

a, \(xy=6\Rightarrow x;y\inƯ\left(6\right)=\left\{\pm1;\pm2;\pm3;\pm6\right\}\)

x	1	-1	2	-2	3	-3	6	-6
y	6	-6	3	-3	2	-2	1	-1

 

b, \(xy=-6\Rightarrow x;y\inƯ\left(-6\right)=\left\{\pm1;\pm2;\pm3;\pm6\right\}\)

x	1	-1	2	-2	3	-3	6	-6
y	-6	6	-3	2	-2	2	-1	1

 

Answer 2

a: =>xy=6

\(\Leftrightarrow\left(x,y\right)\in\left\{\left(1;6\right);\left(6;1\right);\left(2;3\right);\left(3;2\right);\left(-1;-6\right);\left(-6;-1\right);\left(-2;-3\right);\left(-3;-2\right)\right\}\)

b: =>xy=-6

\(\Leftrightarrow\left(x,y\right)\in\left\{\left(-1;6\right);\left(6;-1\right);\left(-2;3\right);\left(3;-2\right);\left(1;-6\right);\left(-6;1\right);\left(2;-3\right);\left(-3;2\right)\right\}\)

Answer 3

a⇔(x,y)∈{(1;6);(6;1);(2;3);(3;2);(−1;−6);(−6;−1);(−2;−3);(−3;−2)