I need some help on integrating the following 3 problems. It has been so long since I have integrated problems at this level so I have forgotten how to do so.

1. x^3/sqrt(42-x^2)

2. 1/(x-sqrt(x+2))

3. x/sqrt(3-2x-x^2)

1/20/2010 8:30:08 PM

integration by parts

1/20/2010 8:51:57 PM

http://www.wolframalpha.com

1/20/2010 10:15:35 PM

maple

1/20/2010 10:22:39 PM

Mathcad

1/21/2010 12:16:23 AM

maple

1/21/2010 12:24:45 AM

any you call yourself a teacher

1/21/2010 2:31:41 AM

nobody likes integration by parts

1/21/2010 12:30:02 PM

TI-89?

2/2/2010 3:33:50 PM

didn't they do that back in the 60s for African American students?

2/2/2010 8:21:02 PM

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3/1/2010 11:52:27 AM

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3/1/2010 11:53:40 AM

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3/1/2010 12:10:06 PM

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3/1/2010 12:51:49 PM

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3/1/2010 1:04:31 PM

http://www.wolframalpha.com/input/?i=integrate+x^3%2Fsqrt%2842-x^2%29
http://www.wolframalpha.com/input/?i=integrate+1%2F%28x-sqrt%28x%2B2%29%29
http://www.wolframalpha.com/input/?i=integrate+x%2Fsqrt%283-2x-x^2%29

[Edited on March 1, 2010 at 10:04 PM. Reason : -]

3/1/2010 10:03:50 PM

3/1/2010 11:38:29 PM

Remind me how you integrate something like exp( -abs(x-a)/b ) dx. Is there a closed form of this or do you have to break it up for x < a and x > a?

4/8/2010 4:23:33 PM

Quote :

"TI-89"

4/12/2010 11:27:13 AM

Quote :

"aga"

5/9/2010 8:11:21 AM