যদি x+1/x = 4  হয় , তাহলে x/x2-3x+1  এর  মান কত?

A    1

B    2

C    -1

D    1/2

Solution

Correct Answer: Option A

 

here, x+1/x=4 or, (x2+1)/x = 4 or, x2+1 =4x now, x/(x2-3x+1)   = x/(x2+1  -3x)                      = x/(4x-3x)                    = x/x                    =1

 

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