1 8 27 () find the law

The rule is: n & # 179; n ≥ 11,8,27,64,125

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1. Find the rule, fill in 1, 8, 27, (), (), (), write the process (that's why this is the calculation process)
2. Simplification (4 / (√ 2 + 2) + 4 / (2 + √ 6) + 4 / (√ 6 + √ 8) +... + 4 / (√ 2012 + √ 2014) (√ 2014 + √ 2)
3. How to calculate 2 + 4 + 6 + 4 + 2012 + 2014
4. 20122013201420152016201720, 18201920, how many days are there respectively? Ask the great God for help
5. 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 which is more beautiful? Ask God for help
6. 2013.2014.2015.2016 how many days in total
7. 1×2/1+2×4/1+4×6/1…… +How much is 2010 × 2012 / 1?
8. It is proved that the value of 2 + cosx + SiNx * cosx is always greater than 0
9. Can SiNx + cosx be greater than 1?
10. 4x-3 + 3x-4 = 14 solution 2 (X-2) + 2 = x + 1 solution 7x-16 = 66 + 2x solution 7 (x + 6) - 3x = 4 (2x + 5) solution 5x + 15-2x-2 = 16 solution
11. Find the law, 1,8,27, (), () 1、1、3、4、7、9、15、16、31、25、（）、（）、( )、（）
12. 1x2 / 2005 + 2x3 / 2005 + 3x4 / 2005 + 4x5 / 2005 + 10 2005 out of 10 2004x2005 = ()
13. 1x2/2005+2x3/2005+3x4/2005+4x5/2005+.+2004x2005/2005=? Please tell me the calculation process again
14. 20051×2+20052×3+20053×4+20054×5+… +20052004×2005=______ ．
15. Observation: 2 = 1 * 2, 2 + 4 = 6 = 2 * 3 = 12 = 3 * 4, 2 + 4 + 6 + 8 = 20 = 4 * 5,..., calculation: 2002 + 2004 + 2006 +... + 2050
16. 2 = 1 * 2,2 + 4 + 6 = 12 = 3 * 4,2 + 4 + 6 + 8 = 20 = 4 * 5,... Calculate 2002 + 2004 + 2006 +... + 2050 according to the above formula
17. 1x2+2x3+3x4+4x5+.+15x16
18. If M is a real number and the opposite number of a root of equation x2-3x + M = 0 is a root of equation x2 + 3x-3 = 0, then the root of equation x2-3x + M = 0 is a real number___ ．
19. It is known that the equation (a + b) x ^ 2-2ax + a = 0 about X has two unequal real roots x1, X2, and the parabola y = x ^ 2 - (2a + 1) x + 2a-5 is the same as X axis It is known that the equation (a + 2) x ^ 2-2ax + a = 0 about X has two unequal real roots x1, X2, and the two intersections of the parabola y = x ^ 2 - (2a + 1) x + 2a-5 and the X axis are located on both sides of the point (2,0). (1) find the value range of the real number a; (2) find the value of a when the absolute value of X1 plus the absolute value of X2 is equal to two root signs 2
20. On the equation of X, does the square of X, the square of X + 2aX + a = 4 have two unequal real roots? Why?