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Hi everyone - I need a bit of help with my math. 70) A tangent line is drawn to the hyperbola xy = c at a point P. a) Show that the midpoint of the line segment cut from this tangent line by the coordinate axes is P. b) Show that the triangle formed by the tangent line and the coordinate axes...

There's a FAQ page on the wiki now, so look through there to answer your questions before creating a new topic. If you feel like your question wasn't answered, post here and someone will (given a more general question) add it to the FAQ. Happy browsing!

Well, I'm not sure how many people here regularly check or use the wiki. Some of us don't know about it, (it's located here for those of you that don't know) and some of us simply don't use it because of a lack of content or something else. I think we have people that are willing to add content...

I'm in PreCalculus (as a freshman in high school) at the University of Minnesota, and it's a bit more advanced than schools, so we do have some complex math, but this doesn't seem like it would make sense. anyway, here it is: Prove by induction The complex conjugate of the binomial expansion...

I was using a Type A core with my Type D, and I just decided to switch cores to see what it would be like. When I switched back, something weird happened. On one particular side, the layer gives a resistance to turning. If I try to force it, then the screw starts to unscrew itself from the...

*I can already solve the 7x7x7 via reduction, btw, so don't mention that.* Ok, so I decided to try to solve my 7x7x7 lay by layer today. I can solve 4 layers, but that's when the cube starts getting restrictive... I was just wondering if any of you have tried this and how far you're...

My friend recently got a Magic. It seemed like a pretty nice puzzle, and the way the "joints" just disappear and reappear is pretty cool. But he said that at the competitions, it starts from exactly the same place every time, and it's the same exact solution every time. Is this true? And if...

NOTE: On bigcubes.com, the java applets don't load for some reason. Also, youtube doesn't load very fast either, because of slow internet. On the last edges, how many types of parity fixes is it neccesary to know to solve it every time? And could anyone point me to a website that has the...

Do I eat it or solve it?

My cube is a store bought, and I want to lube it so it turns better. Currently, I don't know what to use. I'm willing to go buy something Silicon, but I have a question: Does a Silicon Spray have to be pure Silicon, or can it be some random spray for something else with silicon? I have a...

Hi all, I'm Lord Voldemort.... Yes, Voldemort does solve Rubik's Cubes... :) Well, I started cubing because I say my 9 year old cousin solving a cube (I'm 14) and I wanted to too. He taught me how to solve the 2x2x2, and then live 6 weeks ago I learned how to solve the 3x3x3. Now I can solve...

This is a Fridrich LL shortcut I made for myself, and I think others can use it too. http://encodable.com/cgi-bin/filechucker.cgi?action=landing&path=/&file=Tutorial.doc Basically, it splits the OLL step into two steps so it'll take less algorithms.