00:01
All right, in your question, you're supposed to rewrite the series that was given using sigma notation.
00:06
And the series that you're working with is three plus nine plus 27 plus 81.
00:11
The first step in this process would be tried to identify the pattern that's existing with the numbers that we are adding together.
00:19
And i'm looking at this, and to me it looks like each number is a power of three.
00:34
So you just got to get a feel for.
00:36
Try to determine what pattern is occurring.
00:39
For example, if i would have saw 2, 4, 6, 8, my pattern would have been starting at a number and adding 2 each time.
00:50
You know, you just try to identify what you're working with.
00:55
Once you have the pattern, the pattern now needs to be written with a variable that's changing.
01:01
So here i see that the base 3 is not changing in any of the terms that i'm adding together...