SAT1000 - P492

Algebra Level 3

Sequence {an}\{a_n\} is such that an+1+(1)nan=2n1a_{n+1}+(-1)^n a_n=2n-1. Find k=160ak\displaystyle \sum_{k=1}^{60} a_k.


Have a look at my problem set: SAT 1000 problems

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