# calculus area question

• Feb 19th 2009, 05:26 PM
bemidjibasser
calculus area question
I have an idea on this one by looking at the graph, but want to be sure. If f(x)=x^2 -1 and g(x)= 1-x^2, what is the area bound by the graphs of f and g? I came up with 2 units... Correct or no?
• Feb 19th 2009, 05:57 PM
mollymcf2009
Quote:

Originally Posted by bemidjibasser
I have an idea on this one by looking at the graph, but want to be sure. If f(x)=x^2 -1 and g(x)= 1-x^2, what is the area bound by the graphs of f and g? I came up with 2 units... Correct or no?

$\displaystyle Area = \int g(x) - f(x) dx$

*or

Area = $\displaystyle \int$ top function - bottom function dx
• Feb 20th 2009, 03:33 AM
HallsofIvy
Quote:

Originally Posted by bemidjibasser
I have an idea on this one by looking at the graph, but want to be sure. If f(x)=x^2 -1 and g(x)= 1-x^2, what is the area bound by the graphs of f and g? I came up with 2 units... Correct or no?

No, that is not correct. Please show exactly what you did.
• Feb 23rd 2009, 09:50 AM
bemidjibasser
area problem...
I have done some more work on this problem and now came up with 8/3 units... am I right now or is it back to work? I got it...tahnks for the help anyways!