本课配套习题挑战模式1/4
单选题
难度系数:
1.数列1,3,6,10,…的一个通项公式是
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOS7o+WAvOajgOmqjA==
- 答案:Qw==
5oqKPGltZyB3aWR0aD0zNCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82My8yMi9yQkFDRTFTam1iMnhrek91QUFBQmFUUEFUSlkxMTMucG5nIj7liIbliKvku6PlhaXlm5vkuKrpgInpobnvvIzmjpLpmaRC44CBRDvmioo8aW1nIHdpZHRoPTM0IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJGLzFGL3JCQUNKbFNqbWIzQzhOZG1BQUFCZFh6eUFiSTIyNi5wbmciPuWIhuWIq+S7o+WFpULjgIFD77yM5YiZQumAiemhueS4jeespuWQiO+8jOaVhemAiUMu
本课配套习题挑战模式2/4
单选题
难度系数:
2.已知数列中,,则
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IDxpbWcgd2lkdGg9MTUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMkYvNUQvckJBQ0oxU2ptY0tEdzh3UEFBQUJZbWFmdnYwNDM2LnBuZyI+5piv5pWw5YiX55qE56ysPGltZyB3aWR0aD04IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzYzLzIyL3JCQUNFMVNqbWNMQ2puZWdBQUFCTTRzMlR5WTQwMC5wbmciPumhuQ==
- 答案:Qg==
4oi1PGltZyB3aWR0aD03NCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82My8yMi9yQkFDRTFTam1jTERLRVFCQUFBQ0NSQXFERGs3MzYucG5nIj7vvIziiLQ8aW1nIHdpZHRoPTE2MiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC85MC8yNi9yQkFDRkZTam1jTEQ0aGRpQUFBQ3lpQmdCRGsyNzMucG5nIj7vvIzmlYXpgIlCLg==
本课配套习题挑战模式3/4
单选题
难度系数:
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: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOS7o+WFpTxpbWcgd2lkdGg9NjYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMkYvNUQvckJBQ0oxU2ptY3J5NXBCREFBQUI3MHkxU2dVNjg4LnBuZyI+5YiG5Yir6aqM6K+B
- 答案:RA==
5oqKPGltZyB3aWR0aD0zNCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82My8yMi9yQkFDRTFTam1jcXcwUWF5QUFBQmFYTkxTbkU0ODUucG5nIj7ku6PlhaU8aW1nIHdpZHRoPTI1MCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yRi81RC9yQkFDSjFTam1jclR1bjBPQUFBRDFFUGxzRTgzNjQucG5nIj7vvIziiLTpgIlELg==
本课配套习题挑战模式4/4
单选题
难度系数:
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()
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: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOinguWvn+WbvuW9ou+8jOW9kue6s+aAu+e7kw==
- 提示2:IOS7o+eJueauiuWAvOajgOmqjA==
- 答案:QQ==
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