00:01
And this problem will be looking at finding or evaluating a sigma.
00:04
I remember sigma means some.
00:09
The bottom part of our sigma right here where i have i equal to one.
00:12
This is our starting point right here.
00:15
And the five at the top would be where we're stopping or the ending point.
00:19
All right.
00:19
And then this right here would be our sequence we're using or essentially our function.
00:25
So the way sigma works is wherever the sigma is starting.
00:28
You obviously start with that.
00:29
And you just go in order kind of naturally.
00:31
So i'm stopping at five.
00:32
So we're plugging in one for i, two, three, four, and five.
00:35
And then remember, sigma means sums.
00:37
So i have to add that all together.
00:39
All right, so for the first term right here, let me do this in a different color.
00:42
All right, so for our first term right here, we are plugging in one for i, because again, that's where the sigma starts.
00:48
So i'm doing three, parentheses, negative three, one minus one.
00:52
Okay, you just use a calculator to help you work out the computation right here.
00:55
This will give you three...