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

[" If "a_(n)=sum_(r=0)^(n)(1)/(n)_(C_(r))," then "],[a_(n)=sum_(r=0)^(n)(r)/(n)C_(r)" equals "],[[" (A) ",(n)/(2)a_(n)],[" (B) ",(n)/(4)a_(n)],[" (c) ",na_(n)],[" (D) ",(n-1)a_(n)]]

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