Question

1,24 chia hết (2x 1)

2,) ( x+15) chia hết (x+6 )

h)(2x +19)  chia hết (x+2).

Answer 1

1: \(\Leftrightarrow2x-1\in\left\{1;-1;2;-2;3;-3;4;-4;6;-6;8;-8;12;-12;24;-24\right\}\)

=>\(x\in\left\{1;0;\dfrac{3}{2};-\dfrac{1}{2};2;-1;\dfrac{5}{2};-\dfrac{3}{2};\dfrac{7}{2};-\dfrac{5}{2};\dfrac{9}{2};-\dfrac{7}{2};\dfrac{13}{2};-\dfrac{11}{2};\dfrac{25}{2};-\dfrac{23}{2}\right\}\)

2: =>x+6+9 chia hết cho x+6

=>\(x+6\in\left\{1;-1;3;-3;9;-9\right\}\)

hay \(x\in\left\{-5;-7;-3;-9;3;-15\right\}\)

3: =>2x+4+15 chia hét cho x+2

=>\(x+2\in\left\{1;-1;3;-3;5;-5;15;-15\right\}\)

=>\(x\in\left\{-1;-3;1;-5;3;-7;13;-17\right\}\)