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There have been 134 items by Oral1020 (Search limited from 06-06-2020)

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Ứng dụng của toán học khi làm bài kiểm tra :D in Quán hài hước Started by Oral1020, 06-03-2013	0 replies 468 views	Oral1020 06-03-2013
Bộ sách:"12 mảnh ghép vũ trụ" in Quán văn Started by Oral1020, 05-03-2013	2 replies 487 views	Oral1020 05-03-2013
$\dfrac{x^3}{y}+y+1=x^2+x+x... in Phương trình, hệ phương trình và bất phương trình Started by Oral1020, 04-03-2013	0 replies 195 views	Oral1020 04-03-2013
$\left\{\begin{matrix}... in Phương trình, hệ phương trình và bất phương trình Started by Oral1020, 04-03-2013	0 replies 114 views	Oral1020 04-03-2013
$\sum \dfrac{1}{1+x+xy... in Đại số Started by Oral1020, 03-03-2013	0 replies 176 views	Oral1020 03-03-2013
$\sum a^8 \ge \sum \dfrac{b... in Bất đẳng thức và cực trị Started by Oral1020, 02-03-2013	1 reply 288 views	25 minutes 02-03-2013
$\dfrac{AB^2+BC^2+AC^2}{AB.BC+BC... in Hình học Started by Oral1020, 02-03-2013	2 replies 241 views	Oral1020 02-03-2013
$\dfrac{81}{64}(a+bc)(b+ac)... in Bất đẳng thức và cực trị Started by Oral1020, 26-02-2013	1 reply 224 views	Sagittarius912 26-02-2013
$A=\dfrac{a}{1+bc}+\df... in Đại số Started by Oral1020, 24-02-2013	0 replies 145 views	Oral1020 24-02-2013
$(\dfrac{a+b+c}{3})^3... in Bất đẳng thức và cực trị Started by Oral1020, 23-02-2013	2 replies 262 views	25 minutes 23-02-2013
$2(x^3+y^3+z^3)+3xyz \ge x+y+z$ in Bất đẳng thức và cực trị Started by Oral1020, 21-02-2013	1 reply 300 views	nhatquangsin 21-02-2013
$2(a^3+b^3+c^3)+\dfrac{1}{9... in Bất đẳng thức và cực trị Started by Oral1020, 20-02-2013	1 reply 220 views	banhgaongonngon 20-02-2013
Lỗi $\LaTeX$ in Công thức Toán trên diễn đàn Started by Oral1020, 19-02-2013	0 replies 1181 views	Oral1020 19-02-2013
Tính số đo góc $ACB$ in Hình học Started by Oral1020, 18-02-2013	3 replies 362 views	BlackSelena 18-02-2013
$\left \| a \right \|+\left \| b \r... in Bất đẳng thức và cực trị Started by Oral1020, 28-12-2012	7 replies 349 views	tramyvodoi 12-02-2013
$\dfrac{x^{13}+y^{13}+... in Bất đẳng thức và cực trị Started by Oral1020, 02-02-2013	1 reply 275 views	banhgaongonngon 04-02-2013
$\sqrt{x}=1$ in Quán hài hước Started by Oral1020, 04-02-2013	1 reply 418 views	Oral1020 04-02-2013
$\sum a^4 \ge \sum a$ in Bất đẳng thức và cực trị Started by Oral1020, 02-02-2013	2 replies 207 views	thanhdotk14 03-02-2013
$\sqrt[3]{3x+12}+\sqrt[3]{1... in Phương trình, hệ phương trình và bất phương trình Started by Oral1020, 02-02-2013	2 replies 312 views	Oral1020 02-02-2013
A có là một số tự nhiên được hay không ? in Số học Started by Oral1020, 29-01-2013	3 replies 255 views	Oral1020 01-02-2013
$\sum (\dfrac{x}{2})^2... in Bất đẳng thức và cực trị Started by Oral1020, 31-01-2013	1 reply 305 views	Atu 31-01-2013
$(\dfrac{x^7+y^7+1}{\sqrt... in Bất đẳng thức và cực trị Started by Oral1020, 29-01-2013	0 replies 291 views	Oral1020 29-01-2013
$\dfrac{x^4+y^4+z^4+(x+y+z)(xy+yz+xz)... in Bất đẳng thức và cực trị Started by Oral1020, 28-01-2013	1 reply 315 views	vutuanhien 28-01-2013
$\sum x^2+ \dfrac{(\sum x)^3... in Bất đẳng thức và cực trị Started by Oral1020, 28-01-2013	1 reply 300 views	vutuanhien 28-01-2013
Chứng minh $a^2+b^4+c^8 \geqslant ab^2+b^2c^4+c... in Bất đẳng thức và cực trị Started by Oral1020, 13-09-2012	4 replies 588 views	Oral1020 27-01-2013

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