Question 88
Prove that the equation
$$
x^{2} + 2y^{2} + 98z^{2} = \underbrace{77\ldots7}_{2005}
$$
has no integer solutions.
$$
x^{2} + 2y^{2} + 98z^{2} = \underbrace{77\ldots7}_{2005}
$$
has no integer solutions.
MathNet 2005 — Part 02 Question 88
Math Olympiad Vault · MathNet 2005 — Part 02