Question 108
Determine the positive integer $n$, for which the following holds:
$$
n^2 = 2 \cdot (20^4 + 19^4 + 39^4).
$$
$$
n^2 = 2 \cdot (20^4 + 19^4 + 39^4).
$$
MathNet 2019-part-07 — 184 problems (EN–VI) Question 108
Math Olympiad Vault · MathNet 2019-part-07 — 184 problems (EN–VI)