यदि x = 27 और y = log4, तो xy ____ के बराबर है। 

  1. 64
  2. 16
  3. 3/7
  4. 1/16

Answer (Detailed Solution Below)

Option 1 : 64
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Detailed Solution

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संकल्पना:

  • यदि m और n धनात्मक वास्तविक संख्याएँ हैं, तो loga(mn) = nlogam
  • यदि a एक धनात्मक वास्तविक संख्या है और m एक धनात्मक परिमेय संख्या है, तो \({a^{{{\log }_a}m}} = m\) 


गणना:

\({x^y} = {27^{{{\log }_3}4}} = {\left( {{3^3}} \right)^{{{\log }_3}4}}{\rm{ = }}{3^{3{{\log }_3}4}} \\= {3^{{{\log }_3}{4^3}}} = {4^3} = 64\)

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