x + 1/x = √3  হলে x+ 1/x3 এর মান কত? 

A 2

B 4

D 6

Solution

Correct Answer: Option C

দেয়া আছে,
x + 1/x³ = √3

∴ x³ + 1/x³ = (x + 1/x)³ - 3x.1/x(x + 1/x)

= (√3)³ - 3(√3)

= 3√3 - 3√3

= 0

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