x-1/x= 2 হলে, x2+1/x2 এর মান কত?  

A    ৬

B    ০

C    ৪

D    ২

Solution

Correct Answer: Option A

দেয়া আছে ,
x-1/x=2
∴x² +1/x² =(x-1/x)²+2x.1/x=4+2=6

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