1/(x2 - 1) + 1/(x4 - 1) + 4/(x8 - 1) = কত?

• ক (x8 +1)/(x8 - 1)
• খ 1
• গ (x6 + 2x4 + x2 + 6)/(x8 - 1) ✅ সঠিক উত্তর
• ঘ (x4 + 1)/(x8 - 1)