Preference

প্রশ্নঃ 1 + 3 + 5 + .......... + (2x - 1) কত?

  1. ক.
    x (x - 1)
  2. খ.
    x (x + 1)/2
  3. গ.
    x (x + 1)
  4. ঘ.
    x^2
উত্তরঃ
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