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[" 5) If "a(n)=sum(r=0)^(n)(1)/(n(C(r)))...

[" 5) If "a_(n)=sum_(r=0)^(n)(1)/(n_(C_(r)))" then "sum_(r=0)^(n)(r)/(n_(C_(r)))" equal to "],[[" 1) "^((n-1))a_(0)," 2) "n.a_(n)],[" of "(1)/(2)n.a_(n)," 4) "a_(n+1)]]

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