x - 1/x = 2, x3 - 1/x3 = কত?

x - 1/x = 2, x³ - 1/x³ = কত?

A 4

B 12

C 14

D 16

Solution

Correct Answer: Option C

দেয়া আছে , x-1/x=2
প্রদত্ত রাশি , x³ -1/x³
                 =(x-1/x)³ +3.x.1/x(x-1/x)
                 =(2)³ +3×2
                 =8+6
                =14

Solution

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