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River Li's user avatar
River Li's user avatar
River Li's user avatar
River Li
  • Member for 3 years, 7 months
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18
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4
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top 32% this month
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All Questions Answers
Score Newest
question
20
(update) Is there always a real $x$ such that $\cos n_1 x + \cos n_2 x + \cos n_3 x < -2$?
Dec 7, 2021
question
9
Asymptotic analysis of $x_{n+1} = \frac{x_n}{n^2} + \frac{n^2}{x_n} + 2$
Feb 15, 2021
question
5
Is there always a real $x$ such that $\cos n_1 x + \cos n_2 x + \cos n_3 x < -2$?
Dec 6, 2021
answer
4
How to prove this high-degree inequality
Jan 10
answer
3
Inequality of two variables
Oct 4, 2022
answer
3
What is the easiest way to prove the correctness of this inequality
Jan 10
answer
2
Asymptotic analysis of $x_{n+1} = \frac{x_n}{n^2} + \frac{n^2}{x_n} + 2$
Feb 16, 2021
answer
2
Analytic value of $\alpha := \sup_{(x,y) \in C} ax+by$, where $C := \{(x,y) \in \mathbb R^2 \mid x^2 + y^2 \le 1,\,x^2 + c y^2 \le R^2\}$
Oct 8, 2022
question
1
look for differentiable symmetric functions whose global minimizer has all distinct components
Sep 12, 2019
answer
1
An inequality involving sums of squares and sums of cubes
Jun 13, 2019
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41
About the inequality $x^{x^{x^{x^{x^x}}}} \ge \frac12 x^2 + \frac12$
21
The limit and asymptotic analysis of $a_n^2 - n$ from $a_{n+1} = \frac{a_n}{n} + \frac{n}{a_n}$
18
Prove that $a^{4/a} + b^{4/b} + c^{4/c} \ge 3$
16
Without calculator prove that $9^{\sqrt{2}} < \sqrt{2}^9$
15
Find the real root of the almost symmetric polynomial $x^7+7x^5+14x^3+7x-1$

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