x + 1/x = 4 হলে x/(x2 - 3x + 1) এর মান কত?

A 4

B 3

C 2

D 1

Solution

Correct Answer: Option D

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


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

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