Find Out the Value of X Equation

If x + 1/x =1, then the value of (x2 + 3x + 1)/ (x2 + 7x + 1)

  1. 2
  2. 1
  3. 1/2
  4. 3/7
Monis Rasool Professor Asked on 28th August 2015 in Maths.
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1 Answer(s)

Answer : (3) 1/2

Explanation:-
x + 1/x = 1,
Then,  (x2 + 3x + 1)/ (x2 + 7x + 1)
Numerator and denominator divide by x
Then, (x2/x + 3x/x + 1/x)/(x2/x + 7x/x + 1/x)
(x + 3 + 1/x)/ (x + 7 + 1/x)
= (3 + x + 1/x)/(7 + x + 1/x)
Put the value of x + 1/x = 1,
Then, (3 + 1)/(7 + 1)
= 4/8
= ½
Hence, the answer is (3) 1/ 2.

Anurag Mishra Professor Answered on 28th August 2015.
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