If A(K)=[(K,K-1),(K-1,K)] then |A(1)|+|A...

If `A_(K)=[(K,K-1),(K-1,K)]` then `|A_(1)|+|A_(2)|+...+|A_(2011)|=`

2011

`(2011)^(2)`

`(2011)^(3)`

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