SOLUTION: If S1=0.7 and S2=2.1, in a geometric series, determine the sum of the first 12 terms In the series

SOLUTION: If S1=0.7 and S2=2.1, in a geometric series, determine the sum of the first 12 terms In the series

Algebra.Com

Question 1170453: If S1=0.7 and S2=2.1, in a geometric series, determine the sum of the first 12 terms In the series
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
s=a(1-r^n)/(1-r)
r=3 n=12
s=0.7(1-3^12)/-2
=0.7(265720)=186,004
0.7
2.1
6.3
18.9
56.7
170.1
510.3
1530.9
4592.7
13778.1
41334.3
124002.9

RELATED QUESTIONS
If geometric series 2,5+7,5+22,5+…=664300 determine the number of terms in the series (answered by htmentor,ikleyn)

Find the sum of the first 8 terms in the geometric series 1-4+16-64+... (answered by richwmiller)

In an arithmetic series the sum of the first 9 terms is 162 and the sum of the first 12... (answered by Theo)

The second and fifth terms of a geometric series are -15 and 405 respectively. What are... (answered by ewatrrr)

For the geometric series: 8+2+1/2+1/8+... find S1,S2,S3,S4 and S5. I alread found that... (answered by robertb)

The fourth, seventh and sixteenth terms of arithmetic series form a geometric series. If... (answered by kevwill)

In a geometric series, t1=3 and s3=21. Find the common ratio and the sum of the first 7... (answered by reviewermath)

Consider the arithmetic series 3+7+11+15+19+23+27+...and answer the questions which fo.... (answered by ikleyn,02022256164089)

Find the sum of the first ten terms of the geometric series... (answered by greenestamps)