Look at the following column: 2 / 3, 3 / 8, 4 / 15, 5 / 24, 6 / 35

(n^2-1)/n
n>=2

RELATED INFORMATIONS

1. Given the nth power of 2 = a, the nth power of 6 = B, find the value of 12 ν n
2. (- 3x to the second power) (x to the second power - 2x-3) + 3x (x to the third power - 2x to the second power - 5) =
3. Given that the 2x power of 3 = the 3x power of 4 = the 6th power of 12, the basic problem of finding the value of 3 / x + 2 / y is higher than one
4. When x tends to - 2, the second power of X + 2 / X is + 5x + 6
5. Vertex formula of x-square-5x + 6 function 4ac-b square / 4A is the b square in this one 25 or - 25
6. It is known that the power of 2m + n-3 of equation 5x + 7ym + 3n-1 = 2 is a quadratic equation with respect to X and Y. the value of M and N can be obtained Another question is: when x = y + 1, write a solution of this equation
7. What is the coefficient of the highest power term of the third power of 5x - the fourth power of 3x - the fifth power of 0.1X + 2?
8. One third + two-thirds of the square of three + three-thirds of the power of three +. + three of the power of six is equal to how much, in not calculate?
9. How much is the sum of 2n plus one power of two negative two? Only the 2n + 1 power of A.2. The 2n + 1 power of negative 2 C.0 D.1
10. The third power of (A's Square) × (A's fifth power) The nth power of (a to the 3rd power) × (a to the nth power) The fourth power of (- x to the m power) multiplied by X
11. If you look at the following formulas, what rules do you find? 3 × 5 = 15, and 15 = 42-1; 5 × 7 = 35, and 35 = 62-1,11 If you look at the following formulas, what rules will you find? 3 × 5 = 15, and 15 = 42-1; 5 × 7 = 35, and 35 = 62-1, 11 × 13 = 143, and 143 = 122-1____________ .
12. How to correct 5 out of 7-2 out of 15-12 out of 30
13. Simple method 23 and three fifths * 25-12 and three fifths * 25 + 8 and two fifths * 25 (18 and three fifths) square - (16 and seven fifths) square
14. [- 5 / 4] / 0.25 / [- 15 / 4] [- 2 / 5] square / [- 12 / 5] - 8 / 21 * [- 7 / 4] - 0.25
15. [- 5 / 4] / 0.25 / [- 15 / 4] [- 2 / 5] square / [- 12 / 5] - 8 / 21 * [- 7 / 4] - 0.25
16. 5 / 6 - (3 / 4-1 / 2) 2 / 5 + 2 / 3-2 / 5 a simple method requires a simple procedure What can be used is easy to use
17. How about three quarters minus x = two fifths
18. A simple method of multiplying 15 / 19 by 32
19. Simple calculation method of 1 / 3 * 4 + 1 / 4 * 5 + 1 / 5 * 6 + ······ + 1 / 19 * 20
20. Simple calculation method of 19 + 19 + 19 + 19 + 19 + 19 + 19 + 20