X+1/x=6  হলে x2+1/x2  এর মান কত?

A    32

B    34

C    36

D    40

Solution

Correct Answer: Option B

 

    x+1/x=6

বা,( x+1/x)2=62

বা, x2+1/x2+2x.1/x=36

বা, x2+1/x2+2=36

অতএব, x2+1/x2=36-2

                     =34  

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