观察下表: 1 2 3 4 3 4 5 6 7 4 5 6 7 89 10 … 则第________行的各

观察下表:

 1  

 2  3  4

 3  4  5  6  7  

 4  5  6  7  8   9  10

 

则第________行的各数之和等于2 0092.

答案

1 005 

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