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If `f(x)=(log)_x(lnx),t h e nf^(prime)(x)` at `x=e` is equal to `1/e` (b) e (c) 1 (d) zero

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RESONANCE DPP ENGLISH-CONTINUITY AND DIFFERENTIABILITY-All Questions
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  18. y=tan^(-1)""(4x)/(1+5x^(2))+tan^(-1)""(2+3x)/(3-2x)

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