配套习题- 数列的简单表示方法 -【青果学院】

1/4单选题

难度：

1.数列1,3,6,10，…的一个通项公式是

A
B
C
D

正确答案：Qw==

5oqKPGltZyB3aWR0aD0zNCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82My8yMi9yQkFDRTFTam1iMnhrek91QUFBQmFUUEFUSlkxMTMucG5nIj7liIbliKvku6PlhaXlm5vkuKrpgInpobnvvIzmjpLpmaRC44CBRDvmioo8aW1nIHdpZHRoPTM0IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJGLzFGL3JCQUNKbFNqbWIzQzhOZG1BQUFCZFh6eUFiSTIyNi5wbmciPuWIhuWIq+S7o+WFpULjgIFD77yM5YiZQumAiemhueS4jeespuWQiO+8jOaVhemAiUMu

2/4单选题

难度：

2.已知数列

中，

,则

A
B
C
D

正确答案：Qg==

4oi1PGltZyB3aWR0aD03NCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82My8yMi9yQkFDRTFTam1jTERLRVFCQUFBQ0NSQXFERGs3MzYucG5nIj7vvIziiLQ8aW1nIHdpZHRoPTE2MiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC85MC8yNi9yQkFDRkZTam1jTEQ0aGRpQUFBQ3lpQmdCRGsyNzMucG5nIj7vvIzmlYXpgIlCLg==

3/4单选题

难度：

3.若数列的前4项为1,0,1,0，则这个数列的通项公式不可能是

A
B
C
D

正确答案：RA==

5oqKPGltZyB3aWR0aD0zNCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82My8yMi9yQkFDRTFTam1jcXcwUWF5QUFBQmFYTkxTbkU0ODUucG5nIj7ku6PlhaU8aW1nIHdpZHRoPTI1MCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yRi81RC9yQkFDSjFTam1jclR1bjBPQUFBRDFFUGxzRTgzNjQucG5nIj7vvIziiLTpgIlELg==

4/4单选题

难度：

4.用火柴棒按下图的方法搭三角形

按图示的规律搭下去，则所用火柴棒数

与所搭三角形的个数

之间的关系式可以是()

A
B
C
D

正确答案：QQ==

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