Given that the sequence {an} is proportional, the first n terms and Sn = 3 ^ n + K, then the constant k is?

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• 1. The known sequence {an] is an equal ratio sequence. If the sum of n terms in front of gas is Sn = 5 ^ n + K, then the constant k =?
• 2. In the known sequence {an}, A2 = 32, a8 = 1 ／ 2, an + 1 ＜ an Let TN = ㏒ 2 (A1) + ㏒ 2 (A2) + ····· + ㏒ 2 (an), find the maximum value of TN and the corresponding n value
• 3. If the equal ratio sequence {an} is known and A4 + A8 = - 2, then the value of A6 (A2 + 2A6 + A10) is () A. 6B. 4C. 8D. -9
• 4. If A1 = 1, an = - 152 and the sum of the first n terms is Sn = - 341, then the common ratio q =? Number of terms =?
• 5. In the equal ratio sequence {an}, A5 = 162, common ratio q = 3, the first n terms and Sn = 242, find the first term A1 and the number of terms n
• 6. In the equal ratio sequence, A1 = 9 / 8, an = 1 / 3, Sn = 65 / 24, find the common ratio Q and the number of terms n Please help me,
• 7. In the equal ratio sequence {an}, a1 + an = 34, A2 * a (n-1) = 64, the first n terms and Sn = 62, find the number of terms n and the value of common ratio Q
• 8. If M-N = 3, Mn = 10, then m to the second power + n to the second power= Explain why
• 9. Half m fourth power n third power - 5m third power Na + 0.25m square n) divided by - quarter m square n
• 10. -The fourth power of 1 - (1,2-2,3) divided by the third power of 1,3 * [- 2 - (- 3)] - | 0.5-2|
• 11. If the first n terms of the equal ratio sequence {an} and Sn = k · 2 ^ n + 1, then the value of K is____ a) 1 b) - 1 c) 2 D) K can be any value
• 12. It is known that the sum of the first n terms of an is Sn and satisfies Sn = 3 ^ n + K (1) find the value of K and the general formula of sequence an 2) If the sequence BN satisfies a (n + 1) / 2 = (4 + k) ^ anbn, find the first n terms and TN of the sequence BN
• 13. Given the sum of the first n terms of an, Sn = 2 ^ n + K, find the value of K Given the sum of the first n terms of an, Sn = 2 ^ n + K, find the value of K
• 14. The sum of the first n terms of the arithmetic sequence {an} is SN. Given am − 1 + am + 1 − A2M = 0, s2m-1 = 38, then M = () A. 9B. 10C. 20D. 38
• 15. If M > 1, am-1 + am + 1-am2 = 0, s2m-1 = 38, then M is equal to () A. 38B. 20C. 10D. 9
• 16. It is known that SN is the sum of the first n terms of the sequence an, and Sn = 2-2an 1. Prove that the sequence an is an equal ratio sequence 2. Find the general term formula of the sequence an 3. Find the first n terms and wn of the sequence {ANSN} We need a specific process
• 17. Let the sum of the first n terms of the equal ratio sequence {an} be Sn, A1 = 2011, and an + 2An + 1 + an + 2 = 0 (n ∈ n ·), then s2012=______ ．
• 18. If the sum of the first n terms of the sequence {an} is Sn = 2An + 3, then an is an equal ratio sequence Give reasons
• 19. In the equal ratio sequence, Sn is the sum of the first n terms, Sn = 2an-1, and an is obtained An = 2 (n-1) (n-1 power of 2)
• 20. Let the first n terms of sequence {an} and Sn = 2an-2 ^ n (1) prove that {a (n + 1) - 2An} is the general term of finding {an} from the equal ratio sequence (2) The second question doesn't matter. Try to do it