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If ("Lim")(x->a)(a^x-x^a)/(x^x-a^a)=-1 a...

If `("Lim")_(x->a)(a^x-x^a)/(x^x-a^a)=-1` and `a >0` , then find the value of `a` .

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BANSAL-LIMITS AND DERIVATIVES-All Questions
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