chndn

less info

network profile

620 reputation

112

bio	website
	location
	age
visits	member for	6 months
	seen	15 hours ago
stats	profile views	110

summary answers questions tags badges favorites bounties reputation activity

46 Questions

votes activity newest

40	$x$, $y$, $x+y$ and $x-y$ are prime numbers. What is their sum?
4	Number of ordered triplets $(x,y,z)$, $−10\leq x,y,z\leq 10$, $x^3+y^3+z^3=3xyz$
3	Find the points of discontinuity: $f(x) = (x^4+x^3+2x^2)/\tan^{-1}(x)$ if $x\ne0$ and $f(0)=10$
3	Finding the minimum of $\frac pq + \frac rs$ for distinct integers $p, q, r, s$ from $\{1,2,3,4,5,\ldots,16,17\}$
3	Sum of special series: $1/(1\cdot2) + 1/(2\cdot3 )+ 1/(3\cdot4)+\cdots$

view more

620 Reputation

+5	A problem on square matrices
+10	A matrix problem :)
+5	$x$, $y$, $x+y$ and $x-y$ are prime numbers. What is their sum?
+5	If $\omega$ is a complex cube root of unity, show that the following equals null matrix.

view more

5 Answers

votes activity newest

0	Product of matrices; MAPLE giving a strange answer
0	If $\omega$ is a complex cube root of unity, show that the following equals null matrix.
0	A “simple” 3rd grade problem…or is it?
0	Find the points of discontinuity:$ f(x) = \begin{cases}\frac{e^x-1}{\log_{e}(1+2x)} &\text{if} \ x\ne0 \\ \\ 7 &\text{if} \ x=0 \ \end{cases}$
0	Two easy proofs by contradiction

30 Tags

0 continuity × 14	0 differentiability × 5
0 real-analysis × 14	0 geometry × 4
0 combinatorics × 8	0 algebra-precalculus × 3
0 sequences-and-series × 5	0 logic × 3
0 matrices × 5	0 recreational-mathematics × 2

view more

6 Accounts

$Mathematics Stack Exchange$	Mathematics	620 rep	112
	Stack Overflow	101 rep	1
	Server Fault	101 rep
	Super User	101 rep	2
	Ask Ubuntu	68 rep	9

13 Badges

recent class name

Teacher	Analytical
Caucus	Nice Question
Critic	Custodian
Popular Question	Supporter
Good Question	Commentator

view more

0 Active bounties

active offered earned

This user has no active bounties

38 Votes Cast

all time			by type			month		week
31	up		1	question		19		3
7	down		37	answer		19		3

Technology			Life / Arts	Culture / Recreation	Science	Other
Stack Overflow Server Fault Super User Web Applications Ask Ubuntu Webmasters Game Development TeX - LaTeX	Programmers Unix & Linux Ask Different (Apple) WordPress Answers Geographic Information Systems Electrical Engineering Android Enthusiasts IT Security	Database Administrators Drupal Answers SharePoint User Experience Mathematica more (14)	Photography Science Fiction & Fantasy Seasoned Advice (cooking) Home Improvement more (13)	English Language & Usage Skeptics Mi Yodeya (Judaism) Travel Arqade (gaming) Bicycles Role-playing Games more (22)	Mathematics Cross Validated (stats) Theoretical Computer Science Physics more (7)	Stack Apps Meta Stack Overflow Area 51 Stack Overflow Careers

site design / logo © 2013 stack exchange inc; user contributions licensed under cc-wiki with attribution required

rev 2013.5.23.698