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#126 Re: Dark Discussions at Cafe Infinity » Cow Bull 1 » 2008-05-18 02:00:55
Guess #4: 157
#127 Re: Maths Is Fun - Suggestions and Comments » "Last Posted" Weirdness » 2008-05-18 01:55:27
Hmm. Why does a post jump to the top when it's been posted in? And why does it seem to be "last posted" order on all of the other boards?
#128 Maths Is Fun - Suggestions and Comments » "Last Posted" Weirdness » 2008-05-17 12:31:56
- simron
- Replies: 4
When I looked at the "Exercises" forum, it said that JaneFairfax was the last posted. Intrigued (because I had just posted a Legrange Polynomial Interpolation excersise and she wasn't on at the time), I went into the forum. At the top (other than the sticky, which she was not on the "last posted" for) , it had "Legrange Polynomial Interpolation Exercises" by Simron-0 replies-Last post: Simron. What gives? This is not a cache issue, because I've seen this on a lot of computers when I log in. And one other thing to notice is that the "Exercises" forum is the only forum it happens on.
#129 Re: Maths Is Fun - Suggestions and Comments » Minor Avatar Glitch » 2008-05-16 14:07:54
OH! XD Yeah, my avatar's back to the way it was. I was using a computer that I don't use often. Thanks!
#130 Maths Is Fun - Suggestions and Comments » Minor Avatar Glitch » 2008-05-16 11:37:49
- simron
- Replies: 3
I, a while ago, made an avatar, used it for 2 weeks, then changed it to a (in my opinion) better avatar. Today, I realized it's back to my old avatar! (Maybe the forum sofware liked that old one better? 
) I didn't even go into the Personality part of my profile. What gives?
#131 Help Me ! » Polar Coordinates in 3D? » 2008-05-16 01:44:21
- simron
- Replies: 2
How would you do polar coordinates in 3D? Would you get something like (a°,b°,c) or (a,b,c°)?
#133 Re: Dark Discussions at Cafe Infinity » Cow Bull 1 » 2008-05-14 02:22:02
Thanks, JohnnyReinB and ganesh!
Anyone else want to host?
#134 Re: Puzzles and Games » The Nhoj Files » 2008-05-11 02:59:52
I think I have an answer for
#135 Exercises » LeGrange Interpolation Excercises » 2008-05-10 11:26:56
- simron
- Replies: 0
1.(0,1),(1,0) Obvious, I know.
2.(3,0),(0,5),(1,2)
3.(1,2),(3,4) Another obvious one.
4.(1,2),(2,1),(3,4),(4,3)
That's all I have.
Oh, and by the way, LeGrange interpolation is a way to find a polynomial function that represents x-y points.
I couldn't get the uppercase pi to work (That means MULTIPLY together everything in those parentheses.). For those of us (including me) who are confused by that, here's an easier (and quite more elegant) formula:
Have fun!:D
#137 Re: Exercises » High School Mathematics - VI » 2008-05-10 01:54:07
#139 Re: Help Me ! » Foil » 2008-05-06 14:44:05
I'm assuming that the x=3 thing was a typo and that you really meant y=(x-3)(x+3). It's a common error.
Here are the steps:
-Find the vertex. On parabolas, if the vertex is at (a,b), then the line of symmetry is at x=b.
-Set x and y equal to 0 and represent that as a point. Those are your x and y-intercepts.
-Minimum and maximum points: The best thing to do is to graph it. One special property of parabolas is that they cannot have a minimum and a maximum point. If you don't want to do that and you are in Calculus, just take the derivative and set it equal to 0.
Hope this helps!
#140 Re: Help Me ! » derivatives » 2008-05-04 14:06:48
1. Here's a hint: take the derivative, then set that equal to 1/2. Now just solve for x and then plug in x for y.
#141 Re: Maths Is Fun - Suggestions and Comments » Random Words » 2008-05-04 09:40:05
No: I meant that I randomized your page and I got that as part of it.
#142 Re: Maths Is Fun - Suggestions and Comments » Random Words » 2008-05-04 08:15:35
Why? Well, here each die has 82 a's, 15 b's
I took that from his page. That seems to be utter gibberish.
#143 Re: Maths Is Fun - Suggestions and Comments » I might make a trading game » 2008-05-04 07:48:53
I like the draft layout. Now we've just got to program it... (easier said than done)
#144 Re: Maths Is Fun - Suggestions and Comments » Reaction Math with High Scores » 2008-05-04 05:35:22
When I click "High Scores", nothing happens. Any reasons?
#145 Re: Help Me ! » topology » 2008-05-04 03:49:25
That's great, but you might want to turn smilies off.
#146 Re: Help Me ! » quick help with roots » 2008-04-30 08:39:34
Here's a few tips:
First, set each f(x)=0. This is where the graph crosses the x-axis.
Now either factor, complete the square, or use the quadratic formula:
#147 Re: Maths Is Fun - Suggestions and Comments » Wink Murder » 2008-04-28 13:47:20
Is ChocÒ hosting?
#148 Re: Help Me ! » math intermediate » 2008-04-27 15:00:43
Here are a few rules:
#149 Re: Dark Discussions at Cafe Infinity » Cow Bull 1 » 2008-04-27 08:22:12
OK, my guess is:
Guess #5: 204.
#150 Re: This is Cool » pentagon conjecture » 2008-04-24 13:08:21
Ah. I wonder how to prove this.