If x + 1/x = 8, then find the value of 
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 2.5
⇒ 5x / (x2 + 1 - 6x)
We need to convert the given equation in single power of 'x' so we divide the given equation by 'x' on the numerator & denominator.
⇒ 5 / [x + (1/x) - 6]
⇒ 5 / (8 - 6)
⇒ 5 / 2 = 2.5