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Let Tn where n in{1,2,3.4} represents ...

Let `T_n` where `n in{1,2,3.4}` represents four dislinct positive real nunbers other than unity such that `(lnT_n,1/(lnT_n))` represents represents a point on a circle whose centre lies on Y-axis, then ,`sum_(i=1)^4 T_n` is greater than:

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