x/(x² - 3x + 1) হলে {x + (1/x)} এর মান কত?

A 2

B 3

C 4

D 1

Solution

Correct Answer: Option C

x/(x²-3x+1) =1
বা, x²-3x+1=x
বা,x²+1=4x
বা, (x²+1)/x=4
x+1/x=4

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