(x2 + 1)2 = 3x2 হলে x3 + (1/x3) এর মান কত?

A √3

B 3√3

D 1

Solution

Correct Answer: Option C

(x2 + 1)2 = 3x2
⇒ x2 + 1 = √(3x2)
⇒ x2 + 1 = √3x
⇒ x2/x + 1/x = √3x/x
⇒ x + 1/x = √3

প্রদত্ত রাশি = x3 + 1/x3
= (x + 1/x)3 - 3.x.1/x(x + 1/x)
= (√3)3 - 3√3
= 3√3 - 3√3
= 0

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