the thing I learned in this week is Arithmetic sequences／series and Geometric sequences/ series.
- the difference between sequences and series
- importent formula
- how to solve the Arithmetic series?
ex: Find the sum of the following arithmetic series 1,2,3…..99,100
We have a total of 100 values, so n=100. first value is 1 and the last is 100. We plug these values into our formula, get:
- how to solve the geometric series?