中学生网络课堂本课配套习题挑战模式1/3
单选题
难度系数：
1.数列{an}中，
=2,
-
=2n,
,则
=( )
=2,-=2n,,则=( ) | A: 9900 |
| B: 9902 |
| C: 9904 |
| D: 9906 |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：Qg==
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
本课配套习题挑战模式2/3
单选题
难度系数：
2.设数列{an}满足=1，=
+
,数列{ an }的通项公式( )
=1，=+,数列{ an }的通项公式( ) A:  ( ) |
B: ( ) |
C: ( ) |
D:  () |
一次做对，真牛！
+5奖励规则>
- 提示1：IDxpbWcgd2lkdGg9MTcgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvREUvNzEvckJBQ0ZGTmFFNExpXzZuMEFBQUJVTHlxUTM4OTY2LnBuZyI+PTxpbWcgd2lkdGg9MTYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMUEvODYvckJBQ0UxTmFFNEtCcWdTTUFBQUJRV2U0ZEpNMzcwLnBuZyI+Kyg8aW1nIHdpZHRoPTE2IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0RFLzcxL3JCQUNGRk5hRTRQRHZFbzNBQUFCU3RYMFVFMDMyNS5wbmciPi08aW1nIHdpZHRoPTE2IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzFBLzg2L3JCQUNFMU5hRTRLQnFnU01BQUFCUVdlNGRKTTM3MC5wbmciPikrKDxpbWcgd2lkdGg9MTYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMUEvODYvckJBQ0UxTmFFNE9peFAwZ0FBQUJTSGNUS3lBMTEwLnBuZyI+LTxpbWcgd2lkdGg9MTYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvREUvNzEvckJBQ0ZGTmFFNFBEdkVvM0FBQUJTdFgwVUUwMzI1LnBuZyI+KSs8aW1nIHdpZHRoPTE3IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0RFLzcxL3JCQUNGRk5hRTRQZ0pRckdBQUFBMHdsaWJCczc2Ny5wbmciPisoPGltZyB3aWR0aD0xNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9ERS83MS9yQkFDRkZOYUU0TGlfNm4wQUFBQlVMeXFRMzg5NjYucG5nIj4tPGltZyB3aWR0aD0zMiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9ERS83MS9yQkFDRkZOYUU0UGpLdkN4QUFBQmVocWRXMkU2NTUucG5nIj4p
- 答案：QQ==
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
本课配套习题挑战模式3/3
单选题
难度系数：
3.数列{an}中，=2,-=ln(1+
),,则为( )
=2,-=ln(1+),,则为( ) | A: 2+lnn |
| B: 2+(n-1)lnn |
| C: 2+nlnn |
| D: 1+n+lnn |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：QQ==
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
