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Black Book Advanced Problems in MathematicsMathematicsArea Under Curves

For each positive integer n > 1 ; A_n represents the area of the region restricted to the following two inequalities: x^2 n^2 + y^2 1 and x^2 + y^2 n^2 1 . Find _ n A_n .

Options

  1. A4
  2. B1
  3. C2
  4. D3

Correct answer

A. 4

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