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【简答题】
设数列 的前n项和为 ，已知 ， ， （1）求数列 的通项公式； （2）若 ，数列 的前n项和为 ， ，证明： .
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反馈参考答案：
举一反三
【简答题】What kinds of behavior are considered impolite in regard to business card etiquette and may insult your fellow Asian networker? Please list three things as examples from the text.
【简答题】What would you do to save your life if you were bitten by a poisonous snake? List at least three things that you can do to save your life:
【单选题】()通过一个拥有与专用网络相同策略的共享基础设施.提供对企业内部网或外部网的远程访问。
A.
Access
B.
Intranet
C.
Extranet
D.
Internet
【简答题】List at least three things you can do to improve your critical thinking ability in your English language learning.
【简答题】What can you do to protect yourself? (Please list at least three things to do.)
【单选题】.()通过一个拥有与专用网络相同策的共享基础设施,提供对企业内部网或外部局域网的远程访问。
A.
Access
B.
Intranet
C.
Extranet
D.
Internet
【单选题】"Dan loves cooking his pets and his friends." The writer meant to list three things Dan loves, but he forgot to put
A.
a colon after loves
B.
a comma after cooking
C.
a dash after pets
【单选题】()通过一个拥有与专用网络相同策略的共享基础设施,提供对企业内部网或外部网的远程访问。
A.
Access
B.
Intranet
C.
ExHanet
D.
Jntemet
【简答题】fight the virus (4).mp4 List three things we must do to pr us from the sickness.
【简答题】List three things to keep in mind while using slides.
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