00:01
Starting with this very first problem, that i'm just concentrating on this zero to two.
00:10
This graph starts at one and ends up at two, but it's just a straight line.
00:16
Pretty much what they're asking you for the first question is can you find the area under the curve and with the x -axis? and first of all, this is a two by one rectangle.
00:29
So with this two, hide as one, but then you have to add to it this triangle and the area of the triangle is one half times the base times the height.
00:39
So basically we're looking at two and then half of two is one and two plus one equals three.
00:46
So what's different between that one and from two to eight, kind of interesting that they don't even use the same answer, but that's okay, is we have a one by two triangle again, integral from two to eight.
01:02
So it's one half times one times two, but then we have to add to it the rest of this area is actually below the x -axis that has a, looks like it's a width of two and a height of two...