Calculus help
Posted: Thu May 05, 2005 8:03 am
I need some calculus help: I have a third-order curve and I'm trying to find the exact "bend points" but my limited calc knowledge isn't helping. PM me if this sounds like fun to you.
Because if you're willing to drop everything to work on advanced maths then you clearly have a normal life going on.Mostess wrote:You may all continue with your normal lives now.
A problem is presented each week. People come up with proofs/solutions and submit them. Visitors vote for their favorite, and the winner wins.Leaf wrote:ah damn... did I miss this one?
Mathfight.com
sweet. A home page for Puce!!!
No freaking kidding. "Pants ha ha ha" would get my vote every time.sparks wrote:"pants ha ha ha".......48
Yeah, that's what I think would be fascinating. Different ways to come to the same conclusion, some more elegant than others. Kind of Song Fightey.erikb wrote:Man, this was like the best math class I ever took in college. The teacher would present a problem set on Monday, and have them due the next Monday. People would come up with these <i>sick</i> ways of proving stuff, that would just blow your mind that someone would even think of approaching the problem that way. She'd be all "Any solve this differently?" and then someone gets up to the chalkboard and does some weird ass stuff and freaks you the hell out.
The original number takes the form 10x + y (where x and y are whole numbers), and if it's a multiple of 7 then we can say that 10x + y = 7 * SOMETHING, let's say 10x + y = 7a (where a is a whole number). The "proof number" takes the form x - 2y, and if it's a multiple of 7 then we can say that x - 2y = 7 * SOMETHING ELSE, so lets say x - 2y = 7b (where b is a whole number). If we can change the second equation into the first, then that will prove that showing that the second form is a multiple of 7 necessitates the first form being a multiple of seven.LMNOP wrote:To see if a number is a multiple of 7, take off the last digit, double it, and subtract it from what’s left. If your answer is a multiple of 7, so is your original number.
Examples:
385: 38 – (2 x 5) = 28 which is a multiple of 7 therefore so is 385.
386: 38 – (2 x 6) = 26 which is not a multiple of 7 therefore neither is 386.
1,771: 177 – (2 x 1) = 175; 17 – (2 x 5) = 7 therefore 1,771 is a multiple of 7.
I'm looking for alternative theories if you folks want to give it try.Southwest_Statistic wrote:Dan-O from Five-Othe Jazz wrote:How are you guys dealing with the hyphen character? Looks like a pair of ranges in base 32 to me (aka Duotrigesimal). Translated into base 10 we have the range 13,655 - 24 subtracted from the range 510,944-24. Which, assuming these ranges are inclusive, could produce the range 510,944 - 13,656, which would mean that:Code: Select all
five-o - dan-o ---------- five-dao
No no no... you guys are all wrong. He was merely encoding a hidden meaning into his name using IBM standard ASCII character codes. I can't believe no one else sees this. Look:
After thinking about the above fact all day long, I really honestly could not for the life of me figure out what the significance of "One-Thousand-Three-Hundred-Fifty-Three" could possibly be.Code: Select all
"Dan" = 68 + 97 + 110 = (275) "-O" = 45 + 79 = (124) "from" = 102 + 114 + 111 + 109 = (436) "Five" = 70 + 105 + 118 + 101 = (394) "-O" = 45 + 79 = (124) ...therefore... 275 + 124 + 436 + 394 + 124 = (1353)
Then it hit me! The little light bulb inside my head clicked on and I realized that he wasn't encoding the "-" character! He was using in it's mathematic form as a modifier in conjunction with the IBM-ASCII significance of the "O" character, the value of which is "79". Therefore:
947! Of course! Why didn't I see it before! 947 (as everyone knows) is the new overlay area code in Michigan that will be replacing the 248 geographic area, as they have exhausted all the 248 numbers. This includes "Clarkston Michigan", where I live and have lived for the last 5 years.Code: Select all
"Dan-O" = [275] - 79 = (196) "from" = [436] = (436) "Five-O" = [394] - 79 = (315) ...and so... 196 + 436 + 315 = 947
http://www.whitepages.com/9900/maps/DET
Obviously, this is an omen of some kind. Any theorys?