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This one is just asking for the values of x where the function is defined; you don't need to solve it (and I wouldn't want to). Since you're dividing by |(x+1)(x-1)|, you need to make sure that this value doesn't equal zero. Thus, this function is defined for any x ≠ ±1.

Native: English Conversational: French (quatre ans aux lycée) Very basic: Japanese (にほんごがあまりわかりません) I can also pretend to read German, Italian, Old English, Russian, and quite a few others.

Love this thread. Especially the medieval ones. And the "fuel prices" poster just gets funnier with time. Regarding the first post, though, specifically: That's probably the last person you want to get hammered.

Yeah, I saw that. According to an interview with the Orlando Sentinel, NASA Administrator Mike Griffin isn't happy about it, but he is keeping his options open.

I've found that astronautix.com, while a fantastic source for technical info, is somewhat...lacking in terms of analysis. The author seems to think that Gemini is the answer to most, if not all of our problems in manned spaceflight, and while he does raise several valid points, I have to agree...

What, no love for radio? Personally, I'm a fan of National Public Radio. It's a decent source for news that avoids the shouting matches and ego trips that seem to plague most other American news media. Also, one of the NPR stations I listen to carries the BBC World Service overnight. It's a...

This might be an issue with the vessel. What craft are you using?

I hope this explanation is what you're looking for. If not, let me know. United States Representative Mark Udall decided that he really wants the Alpha Magnetic Spectrometer, or AMS, to be added to the ISS. So, on May 15, he introduced H.R. 6063, the NASA Authorization Act of 2008. This bill...

I've had the pleasure of talking at length about the Space Shuttle with both Thomas Akers and Sandra Magnus. They were both very enlightening, especially Sandra Magnus about what it's actually like to fly in the shuttle.

I think it's a bug with multistage.dll. Open the .scn files in your favorite text editor, and wherever it says :multistage/multistagechange it to :multistage/multistage2 That should solve your problems with saving. Actually, I used some equation involving mass flow, specific impulse, and...

I think part of the problem is that Astronautix.com doesn't factor in the throttle-down towards the end of the first stage burn. I crunched some numbers, and I came up with an actual burn time for the first stage of 227 seconds. That might help you get more accurate results.

Hmm... I don't think you can stack Multistage vessels like that. Try changing the PAYLOAD_1 section from Module="Multistage" to Module="Carina" and see how that works.

Could you throw the .msh file for the S-Ib fins in the update, too? They seem to be missing from the v1.0 file.

I've got a couple requests that aren't on the list, if you're looking for something a little different. I'd like to see the old HS-389 and HS-393 satellites from Hughes.

Looks like you need Spacecraft3.dll. You can get it here: http://users.swing.be/vinka/

Couldn't you use this multistage Atlas V addon and just define the two spacecraft as separate payloads?