1+⅔+⅔²+⅔³+.....hitunglah deret geometri tak hingga

jawab

barisan dan deret
1 + 2/3 + 2/3²
a= 1
r  = 2/3

s~ = a / ( 1 - r) 
s~ = 1 / ( 1 - 2/3)
s~ = 1 / ( 1/3)
s~ = 3