Question 168
Determine the values of the positive integer $n$ for which
$$
A = \sqrt{\frac{9n-1}{n+7}}
$$
is rational.
$$
A = \sqrt{\frac{9n-1}{n+7}}
$$
is rational.
MathNet 2009-part-01 — 175 problems (EN–VI) Question 168
Math Olympiad Vault · MathNet 2009-part-01 — 175 problems (EN–VI)