x + (1/x)= 5 হলে, {x/(x² + x + 1)} এর মান কত?
Solution
Correct Answer: Option D
দেওয়া আছে,
x + (1/x)= 5
⇒ x²+1 /x=5
⇒ x²+1=5x
এখন, {x/(x² + x + 1)}
x + (1/x)= 5
⇒ x²+1 /x=5
⇒ x²+1=5x
এখন, {x/(x² + x + 1)}
= {x/(x² +1+ x}
= x/(5x+x) = x/6x = 1/6
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