The document provides 3 math examples: 1) Sum the first 100 terms of the sequence 1/n. 2) Calculate the sum of j=1 to 5 of j^2. 3) Calculate the sum from k=4 to 8 of -1^k. It also gives an example of a double sum from i=1 to 4 of i(1+2+3).

11. Examples
1. Express the sum of first 100 terms of the sequence
{𝑎 𝑛} where 𝑎 𝑛 =
1
𝑛
for n=1, 2, 3, ….
2. What is the value of 𝑗=1
5
𝑗2
3. What is the value of 𝑘=4
8
−1 𝑘

13. Examples
𝑖=1
4
𝑗=1
3
𝑖𝑗 =
𝑖=1
4
𝑖(1 + 2 + 3)

14. Example
𝑘=50
100
𝑘2