Arithmetic Progression, Part 2
Add the terms of an AP one after another and the running totals grow faster and faster. One formula gives any total at once.
In this lesson you will
- Find the sum of the first n terms of an AP with either form of the sum formula
- Find the number of terms when the sum is given
- Find terms from a rule for the sum, and the sum of a block of terms
- Solve real-life problems such as savings and instalments that change by a fixed amount