Question

How do you use a graphing calculator to find the sum of the geometric series `Sigma 5(0.2)^(n-1)` from n=1 to 10?

Answer 1

TI84+: 2nd STAT >MATH 5 2nd STAT > OPS 5 `5(.2^(x-1)),x,1,10,1) = 6.24949`

Explanation:

You can also do MATH 0 and enter the variables and equation if you have the correct release of the operating system.