已知an= {2n+12n+1,1≤n<10000(n+1)2n2+1,n≥10000 ，n∈N*，则 limn→∞ an=_1．

题干

已知a_n= {

,1≤n<10000

,n≥10000 ，n∈N^*，则 limn→∞ a_n=____．

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① How tall is it? ____ A. Zhang Yong.

② Who is the tallest boy? ____ B. Maybe 5 metres.

③ What size are your shoes?____ C. Forty yuan.

④ How much is your T-shirt? ____ D. Size 38

⑤ How old are you?____ E. I'm fifteen years old.

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