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JEE Advanced2013MathematicsBasics of MathematicsActual

If 3 x = 4 x - 1 , then x =

Options

  1. A2 log 3 2 2 log 3 2 - 1
  2. B2 2 - log 2 3
  3. C1 1 - log 4 3
  4. D2 log 2 3 2 log 2 3 - 1

Correct answer

A. 2 log 3 2 2 log 3 2 - 1

Step-by-step solution

3 x = 4 x - 1 x = (x - 1) log 3 4 x ( 1 - 2 log 3 2) = -2log 3 2 x = 2 log 3 2 2 log 3 2 - 1 x log 2 3 = (x - 1).2 x (log 2 3 - 2) = -2 x = 2 2 - log 2 3 x = 1 1 - 1 2 log 2 3 = 1 1 - log 4 3

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