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There have been 222 items by Idie9xx (Search limited from 08-06-2020)

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$f(x^2+y+f(y))=2y+(f(x))^2$ in Phương trình hàm Started by Trần Đức Anh @@, 29-12-2013 hello vmo	1 reply 2993 views	Idie9xx 30-12-2013
Chứng minh tồn tại hcn $ABCD$ thỏa $a+b=c+... in Tổ hợp và rời rạc Started by namcpnh, 20-10-2013 th	1 reply 818 views	Idie9xx 20-10-2013
$f(x)f(y)=y^{\alpha}f(\frac... in Phương trình hàm Started by N H Tu prince, 20-05-2013	3 replies 781 views	Idie9xx 28-09-2013
$f(x+a)=h(x)f(x), \forall x \in \math... in Phương trình hàm Started by thpthang, 03-10-2013 hàm tuần hoàn, f(x+a)=h(x)f(x)	3 replies 761 views	thpthang 05-10-2013
$$f(x)+f(y)+2xyf(xy)=\frac{f(xy)... in Phương trình hàm Started by AnnieSally, 19-10-2013	1 reply 738 views	Idie9xx 19-10-2013
$f(x-f(y))>yf(x)+x$ in Phương trình hàm Started by namcpnh, 25-12-2013 bpth	1 reply 708 views	Idie9xx 27-12-2013
$f(x^2f(x)+f(y))=(f(x))^3+y$ in Phương trình hàm Started by namcpnh, 28-10-2013 pth	4 replies 685 views	namcpnh 01-11-2013
Giải pt nghiệm nguyên. $$x^y+y=y^x+x.$$ in Số học Started by Dung Dang Do, 22-04-2012	3 replies 663 views	Idie9xx 08-10-2013
$f(x+y)+f(x^2+f(y))=(f(x))^2+f(x)+f(y)+y$ in Phương trình hàm Started by Idie9xx, 16-09-2013	3 replies 661 views	Idie9xx 11-10-2013
$f(xy)+f(x+y)=f(x)f(y)+f(x)+f(y),\forall x,y... in Phương trình hàm Started by perfectstrong, 09-10-2013	1 reply 647 views	Idie9xx 10-10-2013
$f(x)+f(\frac{1}{x})=x^... in Phương trình hàm Started by cityhuntervp, 20-09-2013	1 reply 637 views	Idie9xx 28-09-2013
Tìm $\lim_{x\rightarrow +\infty... in Dãy số - Giới hạn Started by Idie9xx, 29-11-2013	2 replies 554 views	Phuong Mark 01-01-2014
$f(xy)+f(x+y)=f(x)f(y)+f(x)+f(y)$ in Phương trình hàm Started by henry0905, 30-11-2013	2 replies 530 views	Idie9xx 01-12-2013
$\left\{{f(x+y)}\right\}=\l... in Phương trình hàm Started by alex_hoang, 18-01-2012	1 reply 481 views	Idie9xx 25-09-2013
$f(2x)=f(sin\frac{x+y}{2}... in Phương trình hàm Started by kb1212, 13-10-2013	1 reply 465 views	Idie9xx 20-10-2013
$m^k\in S\Rightarrow m\in S?$ in Số học Started by Idie9xx, 08-10-2013	2 replies 445 views	Idie9xx 10-10-2013
Tìm $f: \mathbb{N} \rightarrow... in Phương trình hàm Started by Idie9xx, 18-05-2013 3 tháng kỉ niệm :))	2 replies 395 views	perfectstrong 15-10-2013
$f(x)=\max_{y\in\mathbb{R... in Phương trình hàm Started by AnnieSally, 19-10-2013	1 reply 393 views	Idie9xx 19-10-2013
Chứng minh rằng không tồn tại hàm $f:(0;+\infty... in Phương trình hàm Started by AnnieSally, 18-10-2013	1 reply 344 views	Idie9xx 19-10-2013
$f: \mathbb{R} \rightarrow... in Phương trình hàm Started by hihi2zz, 26-11-2013	1 reply 325 views	Idie9xx 01-12-2013
$f(x+f(y))=y+f(x)$ với mọi $x,y \in... in Phương trình hàm Started by AnnieSally, 18-10-2013	1 reply 306 views	Idie9xx 19-10-2013
$f(x)=f(x+1)$ in Phương trình hàm Started by Mrnhan, 02-10-2013	1 reply 285 views	Idie9xx 02-10-2013
Tìm tất cả các hàm số $f:[1;+\infty) \to [... in Phương trình hàm Started by AnnieSally, 19-10-2013	1 reply 269 views	Idie9xx 19-10-2013
Chứng minh rằng $\frac{MA}{MB... in Hình học phẳng Started by RoyalMadrid, 19-12-2013	2 replies 240 views	RoyalMadrid 02-01-2014
Tìm hàm số thỏa mãn $f\left ( nf\left ( m... in Phương trình hàm Started by Phuong Thu Quoc, 30-09-2013	1 reply 212 views	Idie9xx 01-10-2013

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