# General Math

- Math topics not applicable to the categories below. High-school Math
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### Math FAQ

Common math questions, quality answers.
Jul24-14 10:02 AM Greg Bernhardt

### Math Challenges

Test your skills. Math challenges will be posted at least once a week. Suggestions for problems are welcomed.
Aug5-14 02:05 PM fredoniahead

### Math Learning Materials

All math courses. PDFs, tutorials and web links.
Sep15-14 01:06 PM phion
 Meta Thread / Thread Starter Last Post Replies Views Views: 5,291 Announcement: Follow us on social media and spread the word about PF! Jan16-12 Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions... Feb23-13 09:23 AM micromass 1 39,253 How can you represent the largest # that is less than 1? Apr27-11 09:47 AM Hurkyl 97 20,383 i can solve x^x but adding this new x just confuses me any help will do, X^x^x Feb2-09 08:06 PM djuiceholder 7 20,378 is it Al = Ao(1/2)^(t/h) or Al = Ao(1/2)^(h/t) ? where Ao =original amount Al = amount left Apr11-05 08:36 PM dextercioby 1 20,321 Hi! Can anyone explain to me what this sign means. \equiv Dec9-04 11:04 AM dextercioby 15 20,313 I am a student who just finished high school and i am gonna go to college this fall. I got like 7 months to shape up... Mar3-06 09:16 AM Jeff Ford 22 20,279 Im just wandering what is the longest equation in mathematics? Jun22-03 10:49 AM einsteinian77 17 20,227 I was looking around a little bit for an algorithm that would compute a complex number to the nth power. Can... Jul17-08 05:49 AM maze 7 20,119 Good time people Is there any way other than dividing the number from 2 to its half to find all of its divisors?... Feb11-09 02:14 PM Shyan 9 20,099 I got this algebra problem that I have been trying to get around but the answer I get is always different from the... Mar22-06 02:31 PM sauri 9 19,936 What is the difference between these terms? In what context do they apply to? How important is it that we treat them... Jul6-05 11:50 AM mathwonk 4 19,929 Number sequence IQ question. ( 1 2 3 ... Last) This sequence cropped up in an IQ test. I can't for the life of me work out the next term, any ideas? 3, 8, 18,... Jul22-10 05:12 AM Dickfore 73 19,729 Hello, do anyone know a website where we can download for free 'equation editor' or any program to write math... Apr17-07 08:00 AM uart 25 19,698 Can anyone tell me how can I calculate the angle between two lines in 3D. I need in my codings. I know it has a... Jul6-06 01:55 PM somy 3 19,564 How does one do this, for example x= e^(-3t)u(t-4); how do you get x' ?? May6-03 09:38 AM ahrkron 6 19,556 Hey guys, I was doing some questions from spivak when i noticed this integral he set up. To prove that the integral is... Aug8-11 03:33 AM dimension10 23 19,460 parallelogram properties 1.>Each diagonal divides it into two congruent triangles. 2.>Diagonals need not bisect... Apr17-06 12:17 PM arildno 4 19,439 Finding a fraction of a number ( 1 2 3 ... Last) This sounds like first grade mathematics but I need to know the reasoning. Why is it that to find a fraction of a... Sep22-06 04:20 PM mtanti 79 19,382 I was bored the other day and wondered whether or not it would be possible to find out the natural log of the... Feb1-11 05:06 PM HallsofIvy 20 19,246 The other day I was playing with my calculator and noticed that \sqrt{2+\sqrt{2+\sqrt{2+\sqrt{2+...}}}} \approx 2 ... Sep8-09 12:30 AM Elucidus 6 18,927 How do i know under which circumstances to use synthetic and when to just do regular polynomial division? do they not... Jun18-08 07:19 AM jerckomilicic 6 18,833 hey, i was just wondering if anyone could help find the sum of the infinite series defined by 1/. I can split it into... Nov2-09 03:10 PM TRUSKY1965 14 18,812 HII Friends Iam little bit new to matlab and iam trying to use ode45 and wrote code as function dy =... Apr24-07 04:03 PM AiRAVATA 2 18,810 the regular ellipse formula in 2D is x^2/a^2 + y^2/b^2 = 1. but how can it be transformed into a 3D formula including... Sep10-08 09:32 PM symbolipoint 10 18,756 Hi everyone Could you give me a way to calculate the period of every trigonometric functions? thanks Apr8-09 02:42 PM AUMathTutor 4 18,728 This may be an elementary question, but I've been thinking about it a little bit and wondering what other people... Jan20-13 07:43 PM Vorde 41 18,713 Is it possible to obtain a sigma function or Taylor series function for the indefinite integral of a general Gaussian... Nov5-13 04:48 PM jackmell 23 18,645 Can you get logarithms of imaginary numbers? The reason I was wondering is because integrating 1/(1+x^2) WRT x. I... Apr28-13 06:43 PM thelema418 11 18,542 edited..thanks for your help Jan7-10 04:46 AM davitz38 6 18,488 This year I'm a freshman at university - physics - and we are just starting with mathematical analysis. I don't find... Oct9-05 11:55 AM robert Ihnot 7 18,406 1. I am in intermediate Algebra and would like to take one more course to get prepared for Calculus 1. I am currently... Mar12-10 09:10 AM Angry Citizen 2 18,398 I tried some formulas on my graph calculator after reading about root mean square calculations of power and physics.... Dec17-04 10:27 PM Chrono 3 18,389 Some rule says that not all bounded sequence must be convergent sequence , one example is the sequence with general... Jan17-06 10:56 AM HallsofIvy 7 18,288 Hi! In a geometric progression you can find the sum to infinety is some series, for example 4,2,1,... where the... Sep7-04 06:48 AM HallsofIvy 3 18,273 Hello, I have a simple equation (maybe simple for some) that I can't understand how to get from one point to the... Apr24-04 12:55 AM krab 7 18,140 Why is it that many mathematicians in the past who have made significantly profound contributions to the world of... Nov5-11 05:32 PM SteveL27 50 18,120 Hi All, I went to this website where someone wants to know how to calculate the area of some intersecting circles... Aug27-04 09:40 PM Jdo300 4 17,945 (Tanx)^2(Secx) Dec7-08 05:53 AM adriank 5 17,942 I understand that the limit as x -> a for a polynomial function, f(x), is equal to f(a) because the function is always... Sep29-05 10:49 AM HallsofIvy 7 17,886 (x+y)^4=x^4+y^4 We know this is true if x and/or y = 0, but what other possibilities are there? I solved for... Nov22-04 04:58 PM JasonRox 4 17,700 1st qs: I know that d/dx of e^x is e^x, but how bout negative power?(see example below) Is d/dx e^-x = e^-x ? and... Dec12-08 08:09 PM Fredrik 18 17,646

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