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Random math problem.

Posted: Sat Apr 24, 2010 8:08 pm
by keybounce
So what is the integral from 0 to 6 of x^2-5 dx?

Working from dusty old math, that's 1/3rd x^3 - 5/2x^2, at the edges.

For 0, that's 0.
For 6, that's 1/3 * 36 * 6 - 5/2 * 36

That simplifies to 36 * 2 - 5 * 18

Or 72 - 90

Or -18

How can the answer be -18? It's been too long; what am I doing wrong on the integral?

Posted: Sat Apr 24, 2010 8:14 pm
by Rick
Or instead of trying to do the math you could just brush up on your Hitchhiker's Guide! :wink:

Posted: Sat Apr 24, 2010 8:21 pm
by Mad Merlin
What's the derivative of 5/2x^2? (Hint: It isn't 5.)

Posted: Sat Apr 24, 2010 10:22 pm
by keybounce
Well, duuh, if I get a term wrong ...

Posted: Sat Apr 24, 2010 10:44 pm
by keybounce
"Ohh, a floating rock"

He said for no particular reason

Posted: Sat May 01, 2010 2:23 am
by Terrific Noise
If there were more random higher math questions in Game!, I wouldn't have been bored away by now.

Check out Wolfram Alpha

Posted: Wed May 19, 2010 10:17 am
by indros
This web program solves a lot of math problems: http://tinyurl.com/3xyocze