x + 1x=7 হলে x3 + 1x3 এর মান কত?

Question

Shohan

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2025-01-04 04:42

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x + 1x2 = 7 হলে x3 - 1x3= ?

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2x2-3x=2 হলে x3-1x3 এর মান কত?

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যদি x+1x=3 , তবে x3+1x3 এর মান কত?

1 Answers 4 Views

x2-3x+1=0 হলে, x3+1x3 এর মান কত?

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x + 1x=3 হলে x3 + 1x3 এর মান কত?

1 Answers 4 Views

1 Answers 39 Views

Shohan · Accepted Answer · 2024-12-14T13:31:11+06:00

Shohan

দেওয়া আছে, $x + \frac{1}{x} = 7$

এখন, $x^{3} + \frac{1}{x^{3}} = {(x + \frac{1}{x})}^{3} - 3 . x . \frac{1}{x} (x + \frac{1}{x})$

$= {(x + \frac{1}{x})}^{3} - 3 (x + \frac{1}{x})$

$= {(7)}^{3} - 3.7$

$= 343 - 21 - 322 .$

4 views Answered 2024-12-14 13:31