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There have been 22 items by DangHuyNgheAn (Search limited from 07-06-2020)

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Min $P=\sum \frac{x^3}{(y+z)^2}$ in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 09-08-2014	4 replies 531 views	KietLW9 05-05-2021
$2(x^2+y^2+z^2+1)(xy^3+yz^3+zx^3+xyz)\leq (x^2+... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 09-01-2015	0 replies 239 views	DangHuyNgheAn 09-01-2015
$Tìm Max P=3(xy+yz+zx)-xyz$ in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 17-12-2014	7 replies 457 views	Bui Ba Anh 20-12-2014
$P=\sum \frac{a}{a^2+3... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 20-11-2014	4 replies 414 views	DangHuyNgheAn 20-11-2014
$P=\sum \frac{1}{a^2-bc+1... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 15-11-2014	0 replies 233 views	DangHuyNgheAn 15-11-2014
CMR: in Số học Started by DangHuyNgheAn, 05-11-2014	1 reply 329 views	ZDragonSlayerZ 05-11-2014
CMR:$7(a+b+c)+27\geq 16(\sum \sqrt... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 16-10-2014	0 replies 250 views	DangHuyNgheAn 16-10-2014
$2^k\leq a< 2^{k+1}$ in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 06-10-2014	3 replies 215 views	hoctrocuaZel 06-10-2014
Tim Max $P=ab^2+bc^2+ca^2$ in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 06-09-2014	1 reply 168 views	dogsteven 08-09-2014
Tìm Min P in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 04-09-2014 tìm min p	0 replies 197 views	DangHuyNgheAn 04-09-2014
$\prod (x+1)\geq 2(1+\sum \sqrt[... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 23-08-2014	2 replies 269 views	canhhoang30011999 23-08-2014
$y$ là tổng các bình phương cuả 2 số tự nhiên l... in Số học Started by DangHuyNgheAn, 21-08-2014	0 replies 111 views	DangHuyNgheAn 21-08-2014
$4x+3+2\sqrt{1-x^2}-4\sqrt{1+x}=0$ in Phương trình, hệ phương trình và bất phương trình Started by DangHuyNgheAn, 09-08-2014	4 replies 452 views	khanghaxuan 09-08-2014
Min $P=\frac{5}{a^2}+\frac{1}{b^2}+\f... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 09-08-2014	1 reply 108 views	quangnghia 09-08-2014
$\frac{1}{ab(a+c)}-\frac{4}{a}\geq c(... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 30-07-2014	1 reply 369 views	lahantaithe99 30-07-2014
Tìm MaxP in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 24-07-2014	1 reply 246 views	Nguyen Chi Thanh 3003 24-07-2014
CMR in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 21-07-2014	0 replies 286 views	DangHuyNgheAn 21-07-2014
Cho $-1\leq a,b,c\leq 1, a+b+c=0$. Ch... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 14-07-2014	1 reply 291 views	canhhoang30011999 14-07-2014
chung minh in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 04-07-2014	0 replies 112 views	DangHuyNgheAn 04-07-2014
Cho a,b,c>0 thỏa mãn $\sum a=1$.Tim Mi... in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 06-05-2014	1 reply 293 views	Hoang Tung 126 06-05-2014
$a^4+b^3+c^2\leq 2$ in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 03-05-2014	3 replies 153 views	toanc2tb 06-05-2014
$Min P=\sum \frac{a(a-2b+c)}{ab+1}$ in Bất đẳng thức và cực trị Started by DangHuyNgheAn, 03-05-2014	1 reply 204 views	Hoang Tung 126 04-05-2014

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