indefinite integrals

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Old Apr 19, 2009 | 06:41 PM
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Default indefinite integrals

Evaluate ʃ x (-4x^2 - 8)^6 dx

A. -1/28 (-4x^2-8)^7 + C
B. -1/8 (-4x^2+8)^7 + C
C. 1/14 (-4x^2-8)^7 + C
D. -1/56 (-4x^2-8)^7 + C
E. 1/7 (-4x^2-8)^7 + C

can anyone help me on this problem

The answer is not B because thats what i got but if u know how to do this problem could u also show some work of how to get the answer.

Thanks
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Old Apr 19, 2009 | 10:05 PM
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ahhhh come on i know someone knows how to do this
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Old Apr 19, 2009 | 10:29 PM
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http://integrals.wolfram.com/index.jsp

Done.
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Old Apr 19, 2009 | 10:31 PM
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My TI-89 spit out 1.20533E20....pretty sure that's not right since there's not an upper or lower bound to evaluate it lol, stupid calculator. Can't do it on paper it's just been too long lol...
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Old Apr 19, 2009 | 10:31 PM
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(C) Because my name starts with a "C" so it has to be right.
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Old Apr 19, 2009 | 10:48 PM
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The answer us d. 200hrs in physics and math so I'm pretty sure about that. Use u substitution
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Old Apr 19, 2009 | 11:21 PM
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Answer is D
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Old Apr 19, 2009 | 11:42 PM
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Originally Posted by lowaggie
The answer us d. 200hrs in physics and math so I'm pretty sure about that. Use u substitution
Ah yes, u substitution. Damn it's been too long, and im a ME major
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Old Apr 19, 2009 | 11:53 PM
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thanks guys appreciate it
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Old Apr 19, 2009 | 11:58 PM
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LOL don't sweat it. I've got a BS in physics, M Engr in mechanical and was working on a phd studying turbomachinery. Got bored and now I'm teaching high school physics and math so I see it pretty often. Just saving for heads and cam now........
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Old Apr 20, 2009 | 01:24 AM
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Originally Posted by lowaggie
LOL don't sweat it. I've got a BS in physics, M Engr in mechanical and was working on a phd studying turbomachinery. Got bored and now I'm teaching high school physics and math so I see it pretty often. Just saving for heads and cam now........
nice now i know who to pm for future help lol
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Old Apr 20, 2009 | 01:12 PM
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lol anytime. I'm always on here reading, but don't post very often. Our server will let me read the site but not post for some reason. But I'm teaching in the Cy-Fair district starting in August so I think that may be pretty close and my girl is from Wharton so I know the area pretty "okay"
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