How do you get pi using a series?

Answer 1

Well when I want Pie, I go to Marie Callender's (http://www.mcpies.com/) But those are the wrong kind of Pi's. There are many ways to find the value of Pi. Some use calculus, some use other methods. Here is one way Pi= 4/1-4/3+4/5-4/7+4/9-4/11... keep on adding and subtracting alternating the odd numbers and the denominators and 4 as the numerator. This is called the Gregory-Leibniz series