Here's the question you clicked on:
baldymcgee6
FTC problem... link posted.
its -4, but let me try to explain why
ok so from 2 to 8, the area under the curve is 5. from 5 to 8, the area under the curve is 9. we want to find the area under the curve from 2 to 5. think about that for a sec
haha, i know what all of the definite integrals mean, there must be some negative area there.
oh yeah, negative areas are possible. it just means its under the x axis
but how do you know that it is -4?
(area from 2 through 8) - (area from 5 through 8) = area from 2 through 5.
thanks so much, makes sense now.
haha yeah, you have to think of it conceptually. just taking areas out of each other