Calculate the value of (x + 2) (x-1) - 2 (x-3) & sup2; fast bonus! Use complete square formula or square difference formula to solve it!!!! That's the solution! Process, process!

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• 1. It is known that the first term of positive term sequence an is 1, and for any n belongs to N, 1 / A1A2 + 1 / a2a3 + 1 / Anan + 1 = n / a1an + 1, the sum of the first 10 items is 55 Let BN = 1 / Anan + 2, find the first n terms of BN and Sn
• 2. Let a > 0 and a ≠ 1, M = loga (A3 + 1), n = loga (A2 + 1), then the relation between M and N is () A. M > NB. M < NC. M = nd
• 3. A number minus the product of 3 / 2 and 2, the difference is 2 / 5, what's the number
• 4. If 100 and 168 are added to a positive integer, two complete squares can be obtained. Then the positive integer is______ ．
• 5. [(X-Y) & #178; + (x + y) & #178;] (X & #178; - Y & #178;) (m-n-3) & #178; (x-2y + Z) (- x + 2Y + Z) multiplication formula calculation Compare the following two numbers: 1995 × 1997 and 1993 × 1999
• 6. Let TN = 1 / A1A2 + 1 / a2a3 + 1 / a3a4 + +1 / Anan + 1, find TN
• 7. If AB = m (a > 0, b > 0, m ≠ 1) and logm (b) = 2, then logm (a)=
• 8. Subtract a number from the difference between seven eighths and a quarter to get two fifths. What's the number?
• 9. A positive integer, if 100 is a perfect square, if 168 is another perfect square, then the positive integer is______ ．
• 10. If x ^ n = 2, y ^ n = 3, find the value of (x ^ 2Y) ^ 2n
• 11. If a positive integer can be expressed as the square difference of two positive integers, then the positive integer is called "wisdom number" If a positive integer can be expressed as the square difference of two positive integers, then the positive integer is called "wisdom number". According to your understanding, the following four are not "wisdom number": A2002 B2003 C2004 D2005
• 12. Two fifths of a pile of coal is exactly 36 tons. How many tons are there in this pile? What is the product of the sum of seven eighths and three fourths multiplied by their difference?
• 13. Given that m ^ 2 = a, m ^ 3 = B, M > 0 and M is not equal to 1, find 2logm a + logm B
• 14. Given the sum of the first n terms of the sequence {an}, Sn = + 2n, TN = 1 / (A1A2) + 1 / (a2a3) + 1 / (a3a4) +... + 1 / (Anan + 1), find TN
• 15. Calculate x ^ n · x ^ n + 1 + x ^ n + 1 · x ^ n + 2 + (- x) ^ 3 · (- x) ^ 2n-4 fast line constant velocity Rt
• 16. If a positive integer can be expressed as the square difference of two positive integers, it is called wisdom number. What is the wisdom number
• 17. What is five minus two fifths
• 18. Given that x2 + y2 = 1, x > 0, Y > 0, and loga (1 + x) = m, loga (11 − x) = n, then=______ ．
• 19. It is known that the sum of the first n terms of the arithmetic sequence an is Sn, Sn = n ^ 2, sum 1 / (A1A2) + 1 / (a2a3) +. + 1 / [(an-1an] (n ≥ 2) The teacher said, use the split term elimination method to find the complete process,
• 20. (x + 1) ^ 2 - (2-x) ^ [factorization factor}] 101 ^ 3-101 ^ 2 [calculation by factorization factor]