How would I do this problem?
Use the formula a[sub-1]+a[sub-1]r+a[sub-1]r[squared]+...+a[sub-1]r[n-1 power]=
a[sub-1]* 1-r[nth power]/1-r
for the nth partial sum of a geometric sequence to find the sum 1+2/3+4/9+8/27+...+64/729.
possible answers:
701/2187
2059/729
2187/701
2187/729