What is the square of 2011 The problem is: given (a + B + 1) (a + B-1) = 2010, find the value of a + B

±√2011

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1. In the sequence {an}, an = [(- 1) ^ (n + 1)] * (2n + 1) is used to find the first n terms and Sn of the sequence. Pay attention to the method of summation of union terms ~... This method has never been mentioned in class - 0- Pay attention to the method of summation of union terms ~... I haven't really talked about this method in class - 0-
2. Let N and K be natural numbers, where k ≥ 2, prove that n ^ k can be written as the sum of N consecutive odd numbers
3. Let m, n be natural numbers, and satisfy: N2 = M2 + 167, find the value of M, n
4. According to the given conditions, the values of natural numbers x and y are obtained: (1) x, y satisfy X & sup2; + xy = 35; (2) x, y satisfy X & sup2; - Y & sup2; = 45 That's what the exercise book says
5. Given that a and B are natural numbers, and the quadratic power of a - the quadratic power of B = 45, find the value of a and B
6. Given that m and N are positive integers and N & sup2 = M & sup2 + 168, find the value of M and n
7. Given that the equation (m-2) x | m | - 1 + (n + 30) y n & amp; sup2; - 8 = 6 is a quadratic equation of two variables, find the value of M.N. if x = 1 / 2, find the corresponding value of Y The known equation (m-2) x ^| m | - 1 + (n + 30) y ^ n & # 178; - 8 = 6
8. It is known that (m-2) x ^ | M-1 | - (n + 3) y ^ n & sup2-8 = 1 is a univariate linear equation with respect to x, y, and m, n satisfies {Ma + Nb = 5,2ma NB = 7
9. (X-5) (x + 6) = x & sup2; + MX + N, find the values of M and N respectively
10. Given that the natural numbers x and y satisfy the equation x & sup2; - Y & sup2; = 13, find the values of X and y On factorization X & sup2; - Y & sup2 is the square of x minus the square of Y
11. What's the difference between subtracting the sum of two ninths and five ninths from two? Determinant
12. 13.14.15.16.17.18.19.20.21 how to fill in Jiugong grid
13. Sum of sequence: an = 1 / N & # 178;;, sum the first n terms and Sn of sequence an It is better to give a detailed calculation process.
14. Given that a and B are positive integers, and the difference between the square of a and the square of B is equal to the value of a and B?
15. What is one minus one? On the way, I heard two old men arguing, 1 - (- 1) =? Old man a said that I have one yuan (representing 1) and owe old man B one yuan (representing - 1). I (old man a) don't want you (old man b) to pay back (representing - {- 1}). Isn't that one? How can the answer be two?
16. Fill in the nine numbers 3, 5, 7, 9, 11, 13, 15, 17 and 19 in the nine square, so that the sum of the three numbers in horizontal, vertical and oblique rows is equal?
17. How to calculate the sequence of 100, 8, 1, 1 / 4, () and 4, 7, 9, 4, 25, ()? 100、8、1、1/4、（） A.1/4 B.1/12 C.1/20 D.1/32 4、7、9、4、25、（） A.487 B.441 C.386 D.364
18. In the first 2011 positive integers, how many are neither square nor cubic
19. What is one minus one
20. Write the nine numbers 10, 11, 12, 13, 14, 15, 16, 17 and 18 in the 3 * 3 grid, so that the horizontal, vertical and oblique lines are all equal to 42