2x + 2/x = 3 হলে x2 + 1/x2 এর মান কত?

A 1/9

B 1/4

C 1/16

D 1/3

Solution

Correct Answer: Option B

দেওয়া আছে,
   2x+2/x=3
বা,2(x+1/x)=3
বা,(x+1/x)=3/2
বা,x²+1/x²=(x+1/x)²-2.x.1/x
                =(3/2)²-2
                =9/4-2
               =(9-8)/4
                =1/4

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