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MathNet 2018-part-03 — 181 problems (EN–VI) Question 122

Math Olympiad Vault · MathNet 2018-part-03 — 181 problems (EN–VI)

Question 122

Prove that the equation
$$
[x]+[3x]+[9x]+[27x]+[81x]=19480
$$
has no solutions in $\mathbb{R}$ (here $[\alpha]$ denotes the integer part of the real number $\alpha$).