Question
Download Solution PDFযদি
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFপ্রদত্ত:
7a - (7/a) = - 4
ব্যবহৃত সূত্র:
যদি a + (1/a) = P হয়
⇒ a3 - (1/a3) = P3 + 3P
গণনা:
7a - (7/a) = - 4
⇒ a - (1/a) = (- 4/7)
⇒ a3 - (1/a3) = (- 4/7)3 + 3 x (- 4/7)
⇒ (- 64/343) - 12/7
⇒ (- 64 - 588)/343
⇒ a3 - (1/a3) = (- 652/343)
a3 - (1/a3) - 1
⇒ - 652/343 - 1
⇒ (- 652 - 343)/343
⇒ - 995/343
∴ সঠিক উত্তর হল (- 995/343)
Last updated on Jul 7, 2025
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