# General Math

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

### Math FAQ

Jul24-14 10:02 AM Greg Bernhardt

### Weekly Math Challenges

Test your skills. Math challenges will be posted at least once a week. Suggestions for problems are welcomed. Brought to you by Office_Shredder.
T 05:42 AM jostpuur
 Meta Thread / Thread Starter Last Post Replies Views Views: 114,594 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 37,964 Well, From what I understand, to determine the intersection of a line and a plane, we use parametric form of the... Aug16-05 02:51 PM singleton 4 2,914 Is there an "prettier" way to obtain a taylor series for tan x about pi/2? Currently, I expand sin and cos and do... Aug16-05 11:27 AM krab 8 7,103 Hey. I tried to make a function that could calculate the function of a "average" line. See my picture:... Aug16-05 08:33 AM or.han 2 1,388 Hi, guys. In a previous post this problem was given: Let B be a solid box with length L, width W, and height H. Let S... Aug15-05 01:05 PM stevo13 3 1,468 I don't quite understand how to add step functions and would like to get that down before this one class begins. ... Aug15-05 12:31 PM EvLer 9 7,066 Saw this in the thread about "Explaining topology..." Is there an easy way to extend this particular definition... Aug15-05 11:00 AM mathwonk 23 2,669 This question seems a little silly, because it looks so simple but There's one thing I don't understand: If y... Aug15-05 07:33 AM asdf1 4 1,507 Why does lnX!=XlnX-X? Aug15-05 05:42 AM asdf1 15 1,515 Well, I'm doing homework (again). I was introduced to homogeneous systems of planes and then asked why there must... Aug14-05 09:24 PM rachmaninoff 1 1,345 This was done while I was in a stat-mech class a long, long time ago.......didn't understand it very well at the time.... Aug14-05 03:48 PM rachmaninoff 9 3,322 Hi, I'm not sure how to tackle this quiz question I came across : Let P(n) be the number of ways of writing a... Aug13-05 11:49 AM matt grime 10 1,494 Well, I'm learning plane sketching in R3. One of the questions is 5y- z - 10 = 0 It is my understanding that the... Aug13-05 10:43 AM singleton 4 4,018 Hello, I have a question concerning the GMM equation specification. Say we partition each day in 7 intraday... Aug13-05 08:37 AM vienna_quant 8 4,225 Hello friends... If you are aware of a pretty comprehensive list of binomial identities available on the internet... Aug13-05 02:27 AM maverick280857 0 10,606 Hello, I have a system of trigonometric equations from which I should find theta1,..., theta5. Is it possible you... Aug12-05 06:49 PM mikeley 4 2,697 I am really stumped! Using only Trigonometry, I am suppose to calculate the amount of force that is needed to keep a... Aug12-05 03:17 AM LENIN 3 3,344 Do any of you know of excellent advanced multivariable calculus textbooks? If so please list them. (Don't mention... Aug11-05 09:48 PM mathwonk 14 4,633 what is meant by the term 'surface term'? thank you Aug11-05 09:46 PM hypermorphism 11 2,403 I need to prove by mathematical induction that all positive numbers of the form 5^n-4n+15 are divisible by 16 where n... Aug10-05 05:18 PM monet A 8 3,772 this question may sound kind of dumb, so if it is, i apologize, but let say you have a line with a point taken out of... Aug10-05 03:55 AM Timbuqtu 5 969 I am terribly sorry for not being able to write this simple equation in Latex form. (I will be really glad if someone... Aug10-05 03:47 AM rachmaninoff 2 1,598 let be the quotient: Lim_{x->c}\frac{\zeta(1-x)}{\zeta(x)} where x=c is a root of riemann function... then my... Aug9-05 09:14 AM shmoe 4 1,237 What's the difference between: 6.6725985D-20 and 6.6725985E-20 Aug8-05 10:30 PM tony873004 2 1,631 Let be the function h(x)=f(x)+g(x) we want to obtain the values of x so h(x)=0 and we have that f(x) and g(x) have the... Aug8-05 03:23 PM matt grime 15 1,738 hi i want to know what is cordinate system and how to find angle b/w two connected lines Aug8-05 02:46 PM laker88116 2 3,437 I have been thinking about this problem for awhile, but have no idea to even begin solving it. Was wondering if anyone... Aug8-05 02:27 AM VietDao29 1 1,247 i am given an formula Sn= n/2 and i am told to verify the formula represents the sum of n terms of an arithmetic... Aug7-05 07:22 PM yourmom98 5 2,695 From Analitic Geometry; Tan(x) = m m1*m2 = -1 Tan(0) * Tan (90) = -1 Therefore; Aug7-05 06:13 PM Hurkyl 13 1,086 howdy, i am considering of opening a \$5,000 daily compounding certificate of deposit for six months with an... Aug7-05 04:14 PM HallsofIvy 3 1,106 Hi! I'm working through the book "Problem Solving Strategies" by A.Engel at the moment. There is an example in the... Aug7-05 06:28 AM mansi 9 1,250 Ok, i missed the class on finding the inverse of a matrix, and i only have a little bit of an idea on exactly what row... Aug7-05 05:00 AM TD 1 926 Hi any idea on this please. Find the values of constant A,B and C if the ellipse 4x^2 +y^2+Ax+By+C=0 is to be... Aug6-05 04:24 AM TD 5 1,216 Please any help. Use the symbols \beta and \sigma definition of limit to prove that limit... Aug6-05 02:02 AM quasar987 3 3,867 Please help me on this. If f`(x) is continuous on ,apply the Mean Value Theorem to prove the inequalities min \leq... Aug5-05 07:59 PM kidia 4 1,556 I'm trying to rearange an equation but don't manage to get the right results so I guess the rearranging did not work... Aug5-05 05:08 PM HallsofIvy 3 1,889 Im trying to solve (4x-4)/(x+2)< 2x-3 I get it down to 0<(2x+1)(x-2) if x+2>0 0>(2x+1)(x-2) if x+2<0 ... Aug5-05 05:44 AM lurflurf 3 2,318 Hi PPls okay i have studied calculus and i can easily see its application in many things like calculating... Aug4-05 09:11 PM leright 25 9,232 math would be easier if we stuck with 9 digits. any way try solving this. 124x54+39+md=? hint md is roman numerals Aug4-05 05:12 PM Zurtex 1 894 how does weierstrass' approach to analysis differ from the classical approach, i.e leibnizs' and newton's calculus? Aug4-05 04:06 AM MathematicalPhysicist 15 2,368 I've been trying to explain what topology is, and why it is important, to non-mathematicians. Specifically to other... Aug4-05 02:29 AM matt grime 44 4,343

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