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If ⁻¹ x=a ( 1+x 1-x ),|x| < 1 then a is equal to

Options

  1. A1
  2. B2
  3. C1 2
  4. D1 4

Correct answer

C. 1 2

Step-by-step solution

⁻¹ x=a ( 1+x 1-x ),|x| < 1 ...(i) But ⁻¹ x= 1 2 ( 1+x 1-x ) ...(ii) From Eqs. (i) and (ii), we get a= 1 2

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