যদি x + 1/x = 5 হয়, তবে x/(x2 + x+1) এর মান কত?
Solution
Correct Answer: Option B
দেওয়া আছে,
x + 1/x = 5
=> (x2 + 1) / x = 5
=> (x2 + 1) = 5x
সুতরাং x/(x2 + x+1)
= x/(5x+ x)
= x/6x
= 1/6
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