$\int (1 + 2x + 3x^2 + 4x^3 + \dots) \, dx = $

  • A
    $(1 + x)^{-1} + c$
  • B
    $(1 - x)^{-1} + c$
  • C
    $(1 - x)^{-1} - 1 + c$
  • D
    इनमें से कोई नहीं

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