I just want to find out the sum

1. Dec 7, 2008

skyhell6050

$$\sum_{i=0}^{\infty} 1*3(\frac{1}{10})^{i-1}$$

i just want to find out the sum, but i don't know have wat term or method can be use, so....

Last edited: Dec 7, 2008
2. Dec 7, 2008

symbolipoint

Must this be done through Calculus methods? Infinite geometric series are studied in Intermediate Algebra (at least in community colleges). In this example's case, the first term is big, but after that, each term becomes smaller (as you expect with geometric sequence with |r|<1 ).

3. Dec 7, 2008

mutton

Write out some terms to better understand the series.

4. Dec 7, 2008

skyhell6050

have anyone can help me, pls. Appriciate