User Lê Thành Đạt

Lê Thành Đạt

Member for 4 years, 8 months
Last seen more than 1 year ago

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Hello there! I have nothing to say about me so this message will be left as a reminder of how uncreative I am.

(And sure, credit where credit is due, this illustration is courtesy of spareshadez.)

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May 2, 2022
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Mar 27, 2020
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Jul 24, 2019

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Feb 9, 2020
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Mar 24, 2020
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Jul 16, 2019

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Mar 17, 2019
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Jun 9, 2019

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All Questions Answers

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Find all natural solutions $(a, b)$ such that $(ab - 1) \mid (a^2 + a - 1)^2$.

Jan 12, 2020

Prove that $LB = LC$.

Aug 1, 2019

Is there a point $H$ such that $\frac{AH \cdot DM}{HD^2} = \frac{BH \cdot EN}{HE^2} = \frac{CH \cdot FP}{HF^2}$?

May 20, 2019

Prove that the tangent of $(ABC)$ at point $F$ passes through the midpoint of $KJ$.

Sep 27, 2019

Find minimum of $4(a^3 + b^3 + c^3) + 15abc$ subject to $a + b + c = 2$

Mar 18, 2019

Prove that $BC$, $B_1C_1$, $B_2C_2$ are concurrent.

Mar 24, 2019

Prove that $P$ lies on line $CC'$.

Jul 20, 2019

Given 10 statements relating to one another, what is the maximum number of true statements?

Mar 26, 2022

When $a^2 + b^2 + c^2 + d^2 = 1$ and the expression $(a - b)(b - c)(c - d)(d - a)$ reaches its minimum value, determine the value of product $abcd$.

Jun 3, 2022

Prove that for all $\alpha + \beta + \gamma = \pi$, $\sum_{cyc}\frac{\sin\beta}{\cos\beta + 1} = \frac{\sum_{cyc}\cos\beta + 3}{\sum_{cyc}\sin\beta}$.

May 22, 2020