a+(1/a)= √3 হলে a³+(1/a³)= কত?
 

A 9  

B 3  

C 27

Solution

Correct Answer: Option D

a+(1/a)= √3
⟹ {a+(1/a)}³ = (√3)³
⟹ a³+(1/a)³+ 3a x (1/a) x {a+(1/a)}= 3√3
⟹ a³+(1/a)³= 3√3-3√3
∴ a³+(1/a)³= 0

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