Maths-
General
Easy

Question

If the sides be a, b, c then fraction numerator r subscript 1 end subscript minus r over denominator a end fraction plus fraction numerator r subscript 2 end subscript minus r over denominator b end fraction=

  1. c / r 3  
  2. c / r 2  
  3. c / r  
  4. None of these  

The correct answer is: c / r 3

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