tentukan nilai p = 1/3+1/9+1/27+1/81+...

Merupakan deret geometri tak hingga,
a = 1/3
r = 1/3
[tex]\displaystyle S_\infty = \frac{a}{1-r}=\frac{\frac{1}{3}}{1-\frac{1}{3}}=\frac{\frac{1}{3}}{\frac{2}{3}}=\frac{1}{2}[/tex]
Maka, p = 1/2