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Black Book Advanced Problems in MathematicsMathematicsFunctions

Let f(1) = 1 , and f(n) = 2 _ r=1 ^ n-1 f(r) . Then _ r=1 ^m f(r) is equal to :

Options

  1. A3^m - 1 2
  2. B3^m
  3. C3^ m-1
  4. D3^ m-1 - 1 2

Correct answer

C. 3^ m-1

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