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Multiple choice

The value of '$a$' for which exactly one root of the equation $e^ax^2-e^{2a}x+e^{a-1}=0$ lies between $1$ and $2$ are given by,

  1. $\ln \left[\dfrac{5-\sqrt{17}}{4}\right] < a < \ln \left[\dfrac{5+\sqrt{17}}{4}\right]$
  2. $0 < a < 100$
  3. $\ln \dfrac{5}{4}$
  4. None of these

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