创建自己的小题库
搜索
【简答题】
设{an}是公比为q的等比数列．
（Ⅰ）试推导{an}的前n项和公式；
（Ⅱ）设q≠1，证明数列{an+1}不是等比数列．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈
收藏
举报参考答案：
举一反三
【单选题】Task 1 Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 through 40. For each question or statement there are 4 choices marked A, B, C, a...
A.
in his mind
B.
in his laboratory
C.
with microscope
D.
with telescopes
【简答题】设{an}为公比q＞1的等比数列，若a2009和a2010是方程4x2-8x+3=0的两根，则a2011+a2012=（ ）
A.
18
B.
10
C.
25
D.
9
相关题目：
【单选题】Task 1 Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 through 40. For each question or statement there are 4 choices marked A, B, C, a...
A.
in his mind
B.
in his laboratory
C.
with microscope
D.
with telescopes
【简答题】设{an}为公比q＞1的等比数列，若a2009和a2010是方程4x2-8x+3=0的两根，则a2011+a2012=（ ）
A.
18
B.
10
C.
25
D.
9
参考解析：
AI解析
重新生成
题目纠错 0
发布
