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[" E-Mathematics "],[" If "ell=lim(n rar...

[" E-Mathematics "],[" If "ell=lim_(n rarr oo)sum_(r=2)^(n)((r+1)sin(pi)/(r+1)-r sin(pi)/(r))" then find "{ell}." (where "{" denotes the fractional part find "]

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If l = lim_(a-> oo) sum_(r=2)^a [ (r+1) sin (pi/(r+1)) - r sin (pi/r)] then find {l} where ,{} denotes the fractional part.

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