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If $x>y>1$ Which of the following must be true?

  1. $\ln x>\ln y$
  2. $e^x>e^y$
  3. $y^x>x^y$
  4. $\cos x>\cos y$
  1. (i) and (ii)
  2. (i) and (iii)
  3. (iii) and (iv)
  4. (ii) and (iv)
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