1. Apr 24, 2016 #1

   Dragonfall

   

   What is the smallest n such that
   
   [tex]\lg {n\choose0.15n} + 0.15n \geq {112}[/tex]

    

   Last edited: Apr 24, 2016

   Dragonfall, Apr 24, 2016
2. 
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3. Apr 24, 2016 #2

   Math_QED

   

   Homework Helper

   What is lg?

    

   Math_QED, Apr 24, 2016
4. Apr 24, 2016 #3

   Dragonfall

   

   Log base 2

    

   Dragonfall, Apr 24, 2016
5. Apr 24, 2016 #4

   Math_QED

   

   Homework Helper

   Does the log contain the sum of both combinations? (Then you should have added more brackets)

    

   Math_QED, Apr 24, 2016
6. Apr 24, 2016 #5

   Dragonfall

   

   Sorry I formulated the inequality wrong. It's fixed now.
   
   The log only contains the binomial.
   
   I think it might be easier just to do this numerically...

    

   Dragonfall, Apr 24, 2016
7. Apr 25, 2016 #6

   Math_QED

   

   Homework Helper

   You can try to do:
   
   2^LH = 2^RH
   
   But I think the best approach is a numerical method.

    

   Math_QED, Apr 25, 2016

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