Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If the value of x - \(\frac{1}{x}\) = \(\sqrt {1517}\), then find \(\frac{14}{\sqrt {x\;+\;\frac{1}{x}\;+\;10}}\)

Options:

0

7

14

2

Correct Answer:

2

Explanation:

If x - \(\frac{1}{x}\) = \(\sqrt {1517}\)

then x + \(\frac{1}{x}\) = \(\sqrt{(\sqrt{1517})^{2}\;+\;4}\) = 39

Now,

\(\frac{14}{\sqrt {x\;+\;\frac{1}{x}\;+\;10}}\) = \(\frac{14}{\sqrt {39\;+\;10}}\) = 2