is the answer 1999??
12+22+32+..........+20032=2003*4007*334
1*2003+2.2002+3*2001+..........+2003*1=2003*334*x
what is x?
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4 Answers
samagra Kr
·2011-04-15 23:35:31
you can use Σ i (2004-i)
i varying from 1 to 2003.
i think ans is 2005