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[" For a "in R|a|>1," let "],[qquad lim(...

[" For a "in R|a|>1," let "],[qquad lim_(n rarr oo)((1+root(3)(2)+...+root(3)(n))/(n^(7/3)((1)/((an+1)^(2))+(1)/((an+2)^(2))+...+(1)/((an+n)^(2)))))=54],[" Then the possible value(s) of a is/are "],[[" (C) "8," (D) "-6],[" (C) "7," (D) "-9]]

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