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lim(x->oo)cot^(-1)(x^(-a)loga x)/(sec^(-...

`lim_(x->oo)cot^(-1)(x^(-a)log_a x)/(sec^(-1)(a^xlog_x a)),(a >1)`is equal to
(a)`2`
(b)` 1`
(c) `(log)_a2`
(d) 0

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