If y = - 0.5x + 3, then - 2

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• 1. Given the increasing function of F (x) in the domain of definition [- 2,1], f (t-1) < f (1-3T) can find the range of T
• 2. If a and B satisfy 3 √ a + 5 | B | = 7, what is the value range of S = 2 √ A-3 | B |? In a hurry···
• 3. If a and B satisfy 3 √ a + 5 √ B = 7, what is the value range of S = 2 √ A-3 √ B?
• 4. If a and B satisfy (3 radical a) + (5|b |) = 7, find the value range of S = (2 radical a) - (3|b |) There should be a reason
• 5. Sn = 1 + 1 / 2 + 1 / 3 +. + 1 / N, f (n) = s2n + 1-sn + 1, f (n) > m is constant, the value range of M is constant
• 6. Sn = 1 + 1 / 2 + 1 / 3 +. + 1 / N, f (n) = s2n + 1-sn + 1, finding f (n) > log2 (m-1) - log (m-1) 2 constant holds, the value range of M
• 7. Let Sn = 1 / (n + 1) + 1 / (n + 2) + 1 / (n + 3). 1 / 2n, find the value range of Sn That n ∈ n, Sn should be f (n)
• 8. If point P (2m + 1, 3M − 12) is in the fourth quadrant, then the value range of M is______ ．
• 9. If point a (M + 4,1-2m) is in the fourth quadrant, find the value range of M
• 10. It is known that a is the second quadrant angle and | a + 2|
• 11. Given a function y = 2x-6 Q: when - 1 < x < 2, find the value range of Y
• 12. The fourth problem is that we know the first-order function s = 3T + 2
• 13. If vectors a and B are two non-zero vectors, then the range of the angle between vectors a and B is A,（0,π） B,【0,π） C,（0,π】 D,
• 14. Let a and B be nonzero vectors, if (a + b) · B = 2|b|2, and |b ||
• 15. The nonzero vectors a and B satisfy: | B | = 1, and the angle between B and B-A is 30 degrees. Please give us a detailed explanation
• 16. Given that the plane non-zero vector a and vector b satisfy | vector B | = 1 and the angle between vector a and vector b-vector A is 120 °, what is the value range of | vector a | Seeking ideas and results does not need to write too detailed process, thank you
• 17. It is known that the included angle of non-zero vectors a and B is 60 ° and | a | = | B | = 2. If vector C satisfies (A-C); (B-C) = 0, then | C | = 2? Is to find the value range
• 18. Given that the nonzero vector AB satisfies B = 1 and the angle between B and B-A is 30, then the value range of a is
• 19. If the nonzero vectors a and B satisfy: | B | = 1, and the angle between B and B-A is 60 degrees, the value range of | a |?
• 20. A1 = 1, Sn = nan-n (n-1), the general formula of an