SSC CGL 2023 PYQ — Question 73

SSC CGL - 26 Jul 2023 - Shift 2 • Quantitative Aptitude • Q73

If x+1x=1x+\frac{1}{x}=1, then the value of x2+7x+1x2+11x+1=?\frac{x^2 + 7x + 1}{x^2 + 11x + 1}=?

Show answer & explanation

Correct answer: B

Explanation

The correct answer is option 2 i.e. 23\frac{2}{3}.

We know,

x + 1/x = 1 or x2 + 1 = x

⇒ x2+7x+1x2+11x+1\frac{x^2 + 7x + 1}{x^2 + 11x + 1}

⇒ (x + 7x)/(x + 11x) = 8x/12x

⇒ 2/3