Question

помогите с тестами, 13,14,заранее спасибо ​

Answer 1

Ответ:

$13)\ \ \left\{\begin{array}{l}x\geq -3\\x\leq -2\end{array}\right\ \ \ \Rightarrow \ \ \ x\in [-3;-2\ ]\\\\\\\left\{\begin{array}{l}x>-3\\x>-2\end{array}\right\ \ \ \ \Rightarrow \ \ \ x\in (-2\ ;+\infty )\\\\\\\left\{\begin{array}{l}x\geq -3\\x\leq -3\end{array}\right\ \ \ \ \Rightarrow \ \ \ x=-3\\\\\\\left\{\begin{array}{l}x\geq -2\\x\leq -3\end{array}\right\ \ \ \ \Rightarrow \ \ \ \boxed{\ x\in \varnothing \ }$

Ответ:  система Г) не имеет решений .

$14)\ \ \left\{\begin{array}{l}x-1>2x-3\\4x+5>x+17\end{array}\right\ \ \left\{\begin{array}{l}3-1>2x-x\\4x-x>17-5\end{array}\right\ \ \left\{\begin{array}{l}2>x\\3x>12\end{array}\right\ \ \\\\\\\left\{\begin{array}{l}x<2\\x>4\end{array}\right\ \ \ \ \Rightarrow \ \ \ Otvet:\ x\in \varnothing \ .$