M> 1.
Then m-1>; 0, the solution set of inequality is x >;; 1-m/m- 1=- 1。
2. Solution: a≤x≤2 can be obtained by solving the inequality group.
Because the inequality group has no integer solution, a >;; 2.
3. Solution: A
Judging from the meaning of the question, the value of any x is not within the range of 2 ≤ x < 5.
So: A+ 1
4. solution: the solution of the inequality group can be obtained: a ≤ x.
From the meaning of the question, the inequality group has only four integer solutions, so the four integer solutions of x are 1, 0,-1, -2,
So -3≤a≤-2。
5. Solution: There is a problem that the intersection of two expressions is empty, so m+ 1≤2m- 1 can be solved as m≥2.
It is suggested that the landlord should develop the habit of drawing the number axis when solving such inequalities and set problems. Some problems seem complicated. If you draw a number axis according to the meaning of the question, it will be clear at a glance and the problem will be solved.
We can discuss it more later.