x+ 1/x = √3 হলে x+ 1/x3 এর মান কত?

A 1

B 3

C 9

Solution

Correct Answer: Option D

x+ 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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