If x + 2 is greater than a and X-1 is greater than B, then a=_____ ,b=_____ . The solution set is - 1 less than x less than 2

If x + 2 is greater than a and X-1 is greater than B, then a=_____ ,b=_____ . The solution set is - 1 less than x less than 2

This problem a and B are not a fixed number, a and B can be in a range of values
From x + 2 > A: x > A-2
Because - 1-1, i.e. a > 1
For X

If the solution set of the system x + 43 ＞ x2 + 1x + a ＜ 0 is x ＜ 2, then the value range of a is______ ．

If we solve the inequality system first, we can get x < 2x < - A, because the solution set is x < 2. According to the principle of taking the smallest from the same small, if 2 ≤ - A, then a ≤ - 2

If there is no solution for the system of inequalities x ＞ ax ＜ B about X, then the size relation of a and B is a______ b. (fill in ">" or "<" or "≥" ≤ ")

∵ there is no solution for the inequality system X ＞ ax ＜ B of X, and the solution set of the inequality system is: or on the number axis. According to the diagram, a ≥ B. so the answer is: ≥

If there is no solution for the system of inequalities x ＞ ax ＜ B about X, then the size relation of a and B is a______ b. (fill in ">" or "<" or "≥" ≤ ")

∵ there is no solution for the inequality system X ＞ ax ＜ B of X, and the solution set of the inequality system is: or on the number axis. According to the diagram, a ≥ B. so the answer is: ≥