Homework Help: Integral - help needed please

Do you know what the graphs look like? Keep in mind that a positive function times a negative function is negative, etc, and the integral of a positive function is positive, etc.

 

If [tex]f(x)\geq 0[/tex] for x in [a,b], then [tex]\int_{a}^{b}f(x)dx \geq 0[/tex].

 

Do not double-post, please.
Haven't you got enough information on this page (you posted it 3 days ago remember?)? If you have any further questions, why don't consider to post it there, instead of starting a brand new thread??? :grumpy: :grumpy: :grumpy:
This proves that some never read the hints in the posts others have given, and think about it, instead, they are looking for a complete solution!!!