x+1/x=2 হলে x³+1/x³ এর মান কত?

A 1

B 2

C 3

D 4

Solution

Correct Answer: Option B

দেওয়া আছে ,x+1/x=2
x³+1/x³=(x+1/x)³-3.x.1/x(x+1/x)
          =(2)³-3.2
           =8-6
           =2

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