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The sum of n terms of the series 1 + (1 + 3) + (1 + 3 + 5) + …. is :
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- it is the form of 1+2^2+3^2+.........+n^2 =sigma N^2
we know sigma n^2=n(n+1)(2n+1)/6 - 7 years agoHelpfull: Yes(2) No(1)
- 1+2n+n(n+1) is ans
- 8 years agoHelpfull: Yes(0) No(1)
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