1. $\left[\begin{gathered}x\le 4,\\x<6,\\\end{gathered}\right.$
2. $\left[\begin{gathered}x\le10,\\x<10,\\\end{gathered}\right.$
3. $\left[\begin{gathered}x\le11,\\x>11,\\\end{gathered}\right.$
4. $\left[\begin{gathered}x<10,\\x<10,\\\end{gathered}\right.$
5. $\left[\begin{array}{l}x\le10,\\2x>50,\\\end{array}\right.$
6. $\left[\begin{gathered}x<10,\\x>10,\\\end{gathered}\right.$
7. $\left[\begin{array}{l}x\le10,\\x-1<x+10,\\2x>50,\\\end{array}\right.$
8. $\left[\begin{array}{l}x^2+x>x(x+2)-1,\\2x-1<x+4,\\\end{array}\right.$
9. $\begin{cases}x\le10,\\x-1<x+10,\\2x>50,\\\end{cases}$

Ответы

1. $(-\infty;6)$
2. $(-\infty;10]$
3. $(-\infty;+\infty)$
4. $(-\infty;10)$
5. $(-\infty;10]\cup(25;+\infty)$
6. $(-\infty;10)\cup(10;+\infty)$
7. $(-\infty;+\infty)$
8. $(-\infty;5)$
9. нет решений