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Pls see the attachment for the question.

Pls see the attachment for the question.

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Grade:12th pass

1 Answers

Nicho priyatham
625 Points
6 years ago
  • put y=f(x)
  • now 
  •        y=(10x-10-x)/(10x+10-x)
  • by componendo dividendo we get 
(1+y)/(1-y)=102x

  

 

  • x=(1/2)log10(1+y/1-y)
  • so b is correct option
  •  

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