Question 620344
Find the sum of the infinite geometric series:1+1/3+1/9+1/27+1/81.....
.
the common ratio 'r' is 1/3
.
S = a1/(1-r)
S = 1/(1-1/3)
S = 1/(3/3-1/3)
S = 1/(2/3)
S = 3/2 (answer)