Page 5 - Bigyan_Katha_Sepember_2020

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As I was going to St. Ives,
I met a man with seven wives, Every wife had seven sacks,
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2
(2) 12 + 22 + 32 + ... ... + n2 = n(n+1)(2n+1)
n
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[cÖ_g ̄^vfvweK n msL ̈vi e‡M©i mgwó]
6 (3) 13 + 23 + 33 + ... ... + n3 = [n(n+1)]2
2
[cÖ_g ̄^vfvweK n msL ̈vi Nbi mgwó]
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