3+15+75+375+1875+9375+46875+234375 = 292,968
If a sequence is geometric there are ways to find the sum of the first n terms,
denoted Sn, without actually adding all of the terms.
To find the sum of the first n terms of a geometric sequence use the formula
Sn = a1(1 - r^n)/1 - r, r ≠ 1
where n is the number of terms, a1 is the first term and r is the common ratio.
The sum of the first n terms of a geometric sequence is called geometric series.
Answer:
292,968 do u get it