00:01
Okay, note here that i'm finding the sum of a sequence from k equals 0 to 3, negative 1 to the k plus first power over k to the second power.
00:11
So let's just make sure i plugged everything in.
00:13
Let's say i plugged in zero.
00:15
Then i'm going to have negative 1.
00:18
This will be negative 1 times 0, which is going to be 0.
00:22
So i'm not really adding 0 here, but i do know that 0 is an answer.
00:26
Let's say i plugged in 1.
00:27
It'd be negative 1 to the 1 plus 1.
00:30
1 to the second times 1 squared, okay, 1.
00:35
But 1 squared is actually positive 1, not negative 1.
00:38
Okay, so it's actually positive 1.
00:40
Let's say i plugged in k equals 2.
00:42
Okay, this would be negative 1 to the 2 plus 1 or 3.
00:45
Negative 1 to the 3...