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sir,please suggest a standard formula for calculating the sum of first n perfect squares
that is 1+4+9+..................................n=?
formula is n(n+1)(2n+1)\6
thank very much sir i am obligue to you
is it derived by writing 1+4+9+16......................................n=1+1+3+1+3+5+1+3+5+7........................................n.
if it does not bother you please explain
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