23. (9 points) Observe the following lattice diagram and the corresponding equation to explore the law: (1) Observe carefully and write the corresponding equation on the line after 4 (2) In combination with (1), observe the following diagram and write the corresponding equation on the line after 5 (3) Through conjecture, write the equation corresponding to the nth lattice in (2)_____________________________ .

RELATED INFORMATIONS

• 1. Observe the following lattice diagram, observe the following lattice diagram and the corresponding equation, and explore the problems Please guess 1 + 3 + 5 + 7 + 9. +（2n-1)+（2n+1）=？ Please use the above rule to calculate
• 2. What is the 2 / 3 power of the formula x ^ 3 / 6 + O (x ^ 3),
• 3. If f [10x power] = x, then f [5] is equal to the step of solving the problem
• 4. The third power of 4 + the second power of 3 is greater than 2 × 4 × 3. What conclusion can we draw from this
• 5. If the cubic power of the square B of - A is greater than 0, then B () 0 If the cubic power of the square of (- a) multiplied by B is greater than 0, then B () 0
• 6. (#) negative 1 power - 3 Tan 30 ° + 1-row 0 power + root 12
• 7. The result of calculating (2 - √ 3) - 1 power - (√ 2-1) 0 power is
• 8. Calculate the power of - 1 to the power of - 2005, the power of - 3 to the power of - 1, the power of - 2 to the power of - 2 + (- 3 / 4) to the power of 0
• 9. Among the 1000 natural numbers from 1 to 1000, how many are divisible by 3 or 2? I think the meaning of "3 or 2" in this question is: among the 1000 natural numbers from 1 to 1000, can be 3
• 10. Find the sum of all natural numbers that are divisible by 3 but not multiples of 5 within 1000?
• 11. 1 = 1 square; 2 + 3 + 4 = 3 square; 3 + 4 + 5 + 6 + 7 = 5 square; 4 + 5 + 6 + 7 + 8 + 9 + 10 = 7 square 1+2+3+...+n=0.5n(n+1)
• 12. Observation 1 = 12, 2 + 3 + 4 = 32, 3 + 4 + 5 + 6 + 7 = 52 & nbsp; the general conclusion is () A. 1+2… +n=（2n-1）2（n∈N*）B. n+（n+1）+… +（3n-2）=（2n-1）2（n∈N*）C. n+（n+1）+… +（2n-1）=（2n-1）2（n∈N*）D. 1+2… +n=（3n-1）2（n∈N*）
• 13. Given that y is positively proportional to the square + 1 of X, and x = - 3, y = 20, then the function relation is
• 14. The square of quadratic function y = a (X-H) when x = 0. Y = - 12, x = 1, y = - 27 The square of quadratic function y = a (X-H) when x = 0. Y = - 12, x = 1, y = - 27
• 15. It is known that y is positively proportional to the square of X, and when x = 1, y = 2, find the functional relationship between Y and X, and find out the value of y when x = - 3
• 16. If (X-5) (x + 3) is determined by the square of X - kx-15, then k =?
• 17. If (x + 3) (x + m) = the square of X + kx-15, then the value of m-k is a, - 3 B, 5 C, - 2 D, 2 d
• 18. If (x + 3) (x + m) = the square of X + kx-15, then the value of m-k is
• 19. The final question of the first mathematics midterm paper in 2008-2009 Better have an answer
• 20. Using the square difference formula to calculate 2006 times 2008 minus 2007^ 2007^2