Arun tells a story about how an 8-year-old boy added the numbers 1 through 100 in a matter of seconds using the principles of arithmetic series. Then, Katie describes how you can quickly add any pattern of numbers that increase by a set amount each term.

**Lesson 2: Solving equations and inequalities**

**Lesson 4: Limits and series**

- Introduction to limits and series
- Limits
- Use limits to find the derivative
- Exercises: Find the derivative
- Introduction to sequences and series
- Arithmetic series 📝
- Exercises: Arithmetic series
- Finite geometric series
- Exercises: Finite geometric series
- Infinite geometric series
- Exercises: Infinite geometric series
- Course close