Inequalities

Read the complete problem, then answer its numbered subtasks.

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Exercise 20

Book 2 · Inequalities

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Լուծել անհավասարումը.

Subtask 1

$() x + 5 > 5 x + 1$ :

1

$(); 0 - \infty$

2

$(0;$ $) + \infty$

3

$; - \infty$ $1 - 4$

4

$(4;$ $) + \infty$

Subtask 2

$x x - 23 - 2 \cdot 3$ $\leq 63$ :

1

$() - \infty; 0$

2

$(- \infty;$ $] 4$

3

$(- \infty;$ $] 2$

4

$] (- \infty; 1$

Subtask 3

$2 x 2 x 3 - \geq$ :

1

$[] - 3; 1$

2

$[] - 1; 3$

3

$(- \infty;$ $] [) - 3 \cup 1; + \infty$

4

$(- \infty;$ $] [- 1 \cup 3;$ $) + \infty$

Subtask 4

$2 x 1 x - <$ :

1

$(- \infty;$ $] - 1$

2

$[) - 1; \infty$

3

$[1;$ $) \infty$

4

$(- \infty;$ $) + \infty$

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