x+(1/x) = 2 হলে, x/(x²+x-1) এর মান কত?

A 2

B 3

C 1

D 4

Solution

Correct Answer: Option C

     x + (1/x) = 2 

বা, x+ 1 = 2x 

বা, x  - 2x + 1 = 0 

বা, (x - 1)2  = 0 

বা,  x - 1 = 0 

        x = 1 

 এখন, x/ x2  + x - 1   = 1/ 12 + 1 - 1  = 1/1 = 1 

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