Question 88
It is known, that for some value $a$ the equality: $a^4 - \frac{1}{a^2} = 4$ is true. Is it possible, that number $x = a^4 + \frac{1}{a^2}$ is integer?
MathNet 2018-part-06 — 181 problems (EN–VI) Question 88
Math Olympiad Vault · MathNet 2018-part-06 — 181 problems (EN–VI)