Question

Answer 1

giúp mình vs

 

Answer 2

a: Để A nguyên thì \(x-2\in\left\{1;-1;3;-3\right\}\)

hay \(x\in\left\{3;1;5;-1\right\}\)

b: Để B nguyên thì \(x+5\in\left\{1;-1;11;-11\right\}\)

hay \(x\in\left\{-4;-6;6;-16\right\}\)

Answer 3

c: Để C nguyên thì \(2x-3\in\left\{1;-1;3;-3\right\}\)

\(\Leftrightarrow2x\in\left\{4;2;6;0\right\}\)

hay \(x\in\left\{2;1;3;0\right\}\)