The square of X in M of circle + y in N and the square of X in a of hyperbola - Y in B = 1 have the same focus F1, F2 , P is the intersection of two curves, then | Pf1 | PF2 | = () a, M-A, B, one-half (M-A) C, square of M-A, Square D of M-A, root sign m-root sign a

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• 1. ① It is known that: (a + b) 2 = m, (a-b) 2 = n, a and#179; B and#179; are represented by formulas containing m and n
• 2. If (a + b) ^ 2 = m, (a-b) ^ 2 = n, use the formula containing m, n to express: (AB) ^ 3
• 3. If 2 ^ m = a, 2 ^ n = B, 2 ^ m + N + 3 is expressed by the formula containing a and B
• 4. Given that the sum of the first n terms of the sequence {an} is Sn, and 2Sn = 3an-1, n *, find the general term formula of an
• 5. Given that the sequence {an}, Sn is the sum of the first n terms, satisfying the relation 2Sn = 3an-3, the general term formula of {an} can be obtained
• 6. If the sum of the first n terms of the sequence {an} is Sn and 3an = 3 + 2Sn, the general term formula of an is obtained
• 7. The sum of the first n terms of the sequence an is Sn, 2Sn + 3 = 3an, (n belongs to N +). The formula for finding the general term of an
• 8. Sum of the first n terms of sequence: SN = 3an-3 ^ (n + 1) (1) prove that (a (n + 1) - 2 / 3an) is an equal ratio sequence (2) formula for finding an general term (3) compare Sn / 3 ^ n with 6N / (2n + 1) It's OK to ask the first question first,
• 9. Given that the sequence {an}, Sn is the sum of the first n terms, and satisfies 3an = 2Sn + N, n is a positive integer, it is proved that the sequence {an + 1 / 2} is an equal ratio sequence 1. Given the sequence {an}, Sn is the sum of its first n terms, and satisfies 3an = 2Sn + N, n is a positive integer (1) And prove that the sequence {an + 1 / 2} is equal ratio sequence; (2) Note TN = S1 + S2 + S3 +. + Sn and find the expression of TN 2. It is known that the sequence {an} satisfies A1 = 1. A2 = 2, a (n + 2) = an + a (n + 1) / 2, and N is a positive integer (1) Let BN = a (n + 1) - an and prove that {BN} is an equal ratio sequence (2) Find the general expression of {an} Find the answer to the second question~
• 10. Let Sn be the sum of the first n terms of the sequence an, and the point P (an, Sn) (n ∈ n +, n ≥ 1) be on the straight line y = 2x-2. (I) find the general term formula of the sequence an; (II) mark BN = 2 (1 − 1An), the sum of the first n terms of the sequence BN is TN, and find the minimum value of n such that TN > 2011; (III) let the positive sequence CN satisfy log2an + 1 = (CN) n + 1, and find the maximum term in the sequence CN
• 11. If a = m / N + n / m, B = m / N-N / m, find the value of a-square-b-square
• 12. Given that M + 1 / M = 3, find the square of the sum of squares of M + 1 / M (m-1 / M)
• 13. If the square of m plus 1 / 5 m is equal to 1 / 5, find 8 times of m plus 4 times of m plus 4 times of 1 / 1 m
• 14. 2m square - 5m-1 = 0, 1 / 2 of n square + 5 / 2 of n = 0, and M is not equal to N, find: 1 / 1 of M + 1 / N =? It must be detailed. I'm looking for an expert
• 15. 1. Given that m plus 1 / 2 is equal to 5, find the square of m plus 1 / 2 of M
• 16. If the square of (a + b) is m, and the square of (a-b) is n, we use the formula containing m to express the power of (AB) 3
• 17. 1. If A-B = 4 and ab = half, then (a + b) is square=_____ 2. (a + b) square = (a-b) square + m, then the Formula M represents is=_____ 3. (a + b) square = 16, xy = 3, then (a-b) square=_____ 4. (a + B + C) square = () square + 2B () + b square 5. Given x + y = 7, xy = 2, find the values of the following formulas (1) The value of 2x square + 2Y square the value of (2) (X-Y) square
• 18. Given that AB is not equal to 0, and the square of a-2ab-3b = 0, find (a + AB + 2b) of (a-3ab + b) Urgent,
• 19. Given that AB is not equal to 0, the square of a - the square of ab-2b = 0, then the value of 3a-b / 3A + B is
• 20. Given the square of a-2ab-3b = 0 (AB is not equal to 0), then the value of a of B + B of a is 0