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The domain of the function f(x)=x/(sqrt(...

The domain of the function `f(x)=x/(sqrt(sin(lnx)-cos(lnx))),(n in Z)` is (a)`(e^(2npi),e^((3n+1/2)pi))` (b) `(e^((2n+1/4)pi),e^((2n+5/4)pi))` (c)`(e^((2n+1/4)pi),e^((2n-3/4)pi))` (d) none of these

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