Question
Download Solution PDFजर \(\rm 7a - {7\over a} + 4 = 0\), तर \(\rm a^3 - {1 \over a^3} - 1\) शोधा.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेले आहे:
7a - (7/a) = - 4
वापरलेले सूत्र:
जर a + (1/a) = P
⇒ a3 - (1/a3) = P3 + 3P
गणना:
7a - (7/a) = - 4
⇒ a - (1/a) = (- 4/7)
⇒ a3 - (1/a3) = (- 4/7)3 + 3 × (- 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
∴ (-995/343) हे योग्य उत्तर आहे.
Last updated on Jul 2, 2025
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