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450081592 January 18th, 2010 04:08 PM

Find area
 
Find the area between the graph of f and the x-axis.




Erebos January 18th, 2010 04:14 PM

Re: Find area
 
Just take the definite integral of f(x) from -2 to -1 (your final answer will be 11/3).

450081592 January 18th, 2010 04:37 PM

Re: Find area
 
Quote:

Originally Posted by Erebos
Just take the definite integral of f(x) from -2 to -1 (your final answer will be 11/3).


I got 4/7 as my final answer, do I need a minus sign in front of the integral, the anti deritavitive I got is

billymac00 January 18th, 2010 05:15 PM

Re: Find area
 
well, Wolframalpha gives -11/4 ...

450081592 January 18th, 2010 05:19 PM

Re: Find area
 
Quote:

Originally Posted by billymac00
well, Wolframalpha gives -11/4 ...


Can you show me how you got that, what is the anti derivative you got?

aswoods January 18th, 2010 05:21 PM

Re: Find area
 

greg1313 January 18th, 2010 05:25 PM

Didn't see the above.

skipjack January 19th, 2010 02:45 AM

Quote:

Originally Posted by 450081592
do I need a minus sign in front of the integral

The area lies entirely "below" the x-axis, so you should put a minus sign in front of the integral.


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