The proposition "inequality m ^ 2 - M < x ^ 2 + X + 1 holds" is true. The range of real number m is obtained Methods only know that the right side of the inequality is always greater than 0 (x + 1 / 2) ^ 2 + 3 / 4 is greater than 0, and then it won't work. What should I do?

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• 1. Let P: inequality x ^ 2 = 1 > A have two propositions, the solution set of P: inequality x ^ 2 = 1 > A is R; Q: 7-3a > 1 X ^ 2 = the square of X
• 2. It is known that a is the first quadrant angle (360K < a < 360K + 90), so why is k divided into odd and even when finding out which quadrant angle A / 2 is And what quadrant angle is a / 3? K = 3k, k = 3K + 1, k = 3K + 2. Why
• 3. If β∈ [- 4 π, 0], and the terminal edge of β is the same as that of α in (1), then β is obtained
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• 6. The value range of X when TaNx = 0
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• 8. tanx
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• 10. 2Sin (2 * π / 3 + θ) + 2 = 4, finally we get π / - 6 + 2K π. How can we get it! Given that the maximum value of the function y = sin (W + θ) + m is 4, the minimum value is 0, the minimum positive period is π / 2, and π / 3 is an axis of symmetry of its image, then the analytic expressions satisfying the conditions in the following expressions are
• 11. It is known that the solution set of the inequality kx-2 ＞ 0 (K ≠ 0) about X is x ＜ - 3, then the intersection of the line y = - KX + 2 and the X axis is X______ ．
• 12. As shown in figure 1-5-1, the line y = KX + B (k)
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• 14. Set a = {x | K faction + faction / 4 is less than or equal to x, less than or equal to K faction + faction / 2, K belongs to Z}, set B = {x | 6 + x-x ^ 2 is greater than or equal to 0}, find a intersection B (faction is the one equal to 3.1415926 Because of the mobile phone, I can't get a pie,
• 15. Two sets explore how to find the intersection of different elements If a = {X / y = - X & sup2; + 2} B = {Y / y = x & sup2; - 1}, then a ∩ B=_______ The set of a and B is______ But the elements of the two sets are different, one is x and the other is y. I remember that the direct intersection is empty
• 16. 11. For two given sets a and B, a and B belong to a and B___ The set of elements is called the intersection of a and B
• 17. `(1) The intersection of sets a and B means___ Union means___ They are expressed as___ ? (2) Let set I be a complete set, and set a be a subset of it___ , expressed in descriptive form as___ ?
• 18. Set a = 1, set B = 2. Do these two sets intersect? So what is the intersection of set C = 1,2, set D = 2,3? Is it 2 or 2 and an empty set?
• 19. Let u = {x x = k, K ∈ Z}, q = x x = 2K, K ∈ Z}, t = {x x = 2K + 1, K ∈ Z} a. The complement of q = t b. Q ∪ t is the proper subset of U c. Q is the proper subset of T d. T is the true son of Q Which of them is right and why not B
• 20. It is known that the distance between points a (a, 2) and B (2, a + 1) is equal to the root sign 5, and the value of a is obtained