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)

When n = 1, the minimum value of Sn = 1 / 2 can be obtained
S2-S1=1/12=1/3-1/4

RELATED INFORMATIONS

1. If point P (2m + 1, 3M − 12) is in the fourth quadrant, then the value range of M is______ ．
2. If point a (M + 4,1-2m) is in the fourth quadrant, find the value range of M
3. It is known that a is the second quadrant angle and | a + 2|
4. It is known that α is the second quadrant angle, and | α + 2 | ≤ 4, then the value range of α is______ ．
5. Given that point a (2-A, a + 1) is in the fourth quadrant, the value range of a is () A. a＜1B. a＜-1C. -1＜a＜2D. a＞2
6. If the point P (A-3, a + 1) is in the second quadrant, then the value range of a is:
7. If point P (3-A, 2) is in the second quadrant, then the value range of a is
8. If point P (A-1, the square of 1 / A-4) is in the fourth quadrant, then the value range of a is?
9. If point P (a, A-3) is in the fourth quadrant, then the value range of a is () A. -3＜a＜0B. 0＜a＜3C. a＞3D. a＜0
10. In the plane rectangular coordinate system, if the point P (m, m-2) is in the fourth quadrant, then the value range of M is () A. m＞2B. m＜0C. 0＜m＜2D. 0≤m≤2
11. 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
12. 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
13. 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
14. If a and B satisfy 3 √ a + 5 √ B = 7, what is the value range of S = 2 √ A-3 √ B?
15. If a and B satisfy 3 √ a + 5 | B | = 7, what is the value range of S = 2 √ A-3 | B |? In a hurry···
16. 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
17. If y = - 0.5x + 3, then - 2
18. Given a function y = 2x-6 Q: when - 1 < x < 2, find the value range of Y
19. The fourth problem is that we know the first-order function s = 3T + 2
20. 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,