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There have been 61 items by hoanglong2k (Search limited from 30-05-2020)

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$$\sum a^3+\frac{3abc(\sum... in Bất đẳng thức - Cực trị Started by hoanglong2k, 07-05-2015	3 replies 270 views	dogsteven 07-05-2015
$\dfrac{a-b}{ab+4b+}+\... in Bất đẳng thức - Cực trị Started by hoanglong2k, 20-03-2016 qhh	1 reply 813 views	Quoc Tuan Qbdh 21-03-2016
$\frac{\sum\sqrt{ab-1}... in Bất đẳng thức - Cực trị Started by hoanglong2k, 24-02-2015	0 replies 293 views	hoanglong2k 24-02-2015
$\frac{11(a+b+c)}{3}\g... in Bất đẳng thức - Cực trị Started by hoanglong2k, 11-07-2015	8 replies 799 views	binhnhaukhong 11-07-2015
$\frac{a+b}{\sqrt{a^2+... in Bất đẳng thức và cực trị Started by hoanglong2k, 24-02-2015	7 replies 954 views	viet nam in my heart 26-02-2015
$\frac{a+b+c}{3}\geq... in Bất đẳng thức - Cực trị Started by hoanglong2k, 24-02-2015 võ quốc bá cẩn	2 replies 641 views	lahantaithe99 26-02-2015
$\frac{a^3+b^3+c^3+3}{abc+1... in Số học Started by hoanglong2k, 09-07-2015	2 replies 414 views	Chris yang 09-07-2015
$\left ( \sum \dfrac{a^4}... in Bất đẳng thức - Cực trị Started by hoanglong2k, 21-12-2015	2 replies 974 views	HoangVienDuy 23-03-2016
$\left\{\begin{matrix}... in Phương trình - hệ phương trình - bất phương trình Started by hoanglong2k, 19-02-2015	1 reply 242 views	dogsteven 19-02-2015
$\left\{\begin{matrix}... in Phương trình - hệ phương trình - bất phương trình Started by hoanglong2k, 11-07-2015	1 reply 163 views	thuy99 13-07-2015
$\left\{\begin{matrix}... in Phương trình - hệ phương trình - bất phương trình Started by hoanglong2k, 18-10-2015	10 replies 632 views	Quoc Tuan Qbdh 25-10-2015
$\left\{\begin{matrix}... in Phương trình, hệ phương trình và bất phương trình Started by hoanglong2k, 23-04-2015	4 replies 339 views	tonarinototoro 23-04-2015
$\sqrt{(\sum a)^3}\sum... in Bất đẳng thức và cực trị Started by hoanglong2k, 04-07-2015	1 reply 358 views	hoanglong2k 15-12-2015
$\sqrt[3]{a}+\sqrt[3]{b... in Bất đẳng thức - Cực trị Started by hoanglong2k, 31-07-2015 mathlinks.ro	5 replies 1301 views	hoduchieu01 01-09-2015
$\sum \frac{1}{a^k+b^k... in Bất đẳng thức và cực trị Started by hoanglong2k, 14-07-2015	0 replies 287 views	hoanglong2k 14-07-2015
$\sum \frac{1}{x^{2k... in Bất đẳng thức và cực trị Started by hoanglong2k, 08-07-2015 võ quốc bá cẩn, mathlinks.ro	1 reply 1039 views	dogsteven 08-07-2015
$\sum \frac{a}{bc+1}... in Bất đẳng thức và cực trị Started by hoanglong2k, 29-04-2015	9 replies 390 views	tonarinototoro 30-04-2015
$\sum \frac{a^2}{b+c}... in Bất đẳng thức - Cực trị Started by hoanglong2k, 08-10-2015	0 replies 427 views	hoanglong2k 08-10-2015
$\sum \left (\dfrac{a}... in Bất đẳng thức - Cực trị Started by hoanglong2k, 14-04-2016	0 replies 421 views	hoanglong2k 14-04-2016
$\sum \sqrt{a+1}\geq \... in Bất đẳng thức - Cực trị Started by hoanglong2k, 28-05-2015	3 replies 420 views	hoanglong2k 29-05-2015
$\sum \sqrt{k^2a^2+bc}\leq... in Bất đẳng thức - Cực trị Started by hoanglong2k, 11-06-2016 marathon bđt	2 replies 745 views	hoanglong2k 12-06-2016
$(a+b)(b+c)(c+a)\geq (ab+c)(bc+a)(ca+b)$ in Bất đẳng thức và cực trị Started by hoanglong2k, 16-02-2015	1 reply 207 views	dogsteven 16-02-2015
$1\leq \sum \sqrt{\frac... in Bất đẳng thức và cực trị Started by hoanglong2k, 26-04-2015	4 replies 374 views	Hoang Nhat Tuan 26-04-2015
$2\sum \frac{a}{b}... in Bất đẳng thức và cực trị Started by hoanglong2k, 07-06-2015	3 replies 398 views	nguyenhongsonk612 08-06-2015
$3\sum a^2\sum a^2b^2\geq \prod... in Bất đẳng thức - Cực trị Started by hoanglong2k, 29-05-2015	1 reply 640 views	khanghaxuan 29-05-2015

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