A 1
B 2
C -1
D 1/2
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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