Skip to content / Đến nội dung
ThichHocToan.com

MathNet 2018-part-06 — 181 problems (EN–VI) Question 38

Math Olympiad Vault · MathNet 2018-part-06 — 181 problems (EN–VI)

Question 38

Let $x, y$ be distinct positive numbers, and let $n$ be a positive integer greater than 1. If
$$
x^n - y^n = x^{n+1} - y^{n+1},
$$
prove that
$$
1 \lt x + y \lt \frac{2n}{n + 1}.
$$