Sunday, February 1, 2009

problem on sequences

If Sn is the sum of the cubes of the first n natural numbers, find the sum of 1 / sqrt(Sn) where n varies from 1 to 2000
first use the formula for sum of the cubes of the first n natural numbers
take the square root and the reciprocal then adjust into a telescoping series

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1 comment:

  1. plz solve my this problem
    This is Q of sequence & series hlp me1+2+4+8+16+........find nth term of the series & find sum of first n ter?


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