Math+ check!
posted by bob! .
oka so the question is as follows:
for the geometreic sereis 8+48+288+... find the sum of the first ten terms, s 10
so I would use the formula:
sn= a(1r^n)/ 1r
were
a= 8
r= 48
n= 10
8(1(48)^10)/148
I get lost I don't know how to arrive to the answer from here! but is the rest correct?
No. r is 6. Notice 8*6= 46, 48*8= 288, etc.
Other wise, it is ok.
Respond to this Question
Similar Questions

Math....Please help I have a deadline for tonight!
Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27… to find the following: b) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 10 terms? 
PRE CAL SEQUENCES
Given the following finite sum 1/(1*2)+1/(2*3)+1/(3*4)+1/(4*5)+....+1/(n(n+1)) a) Find the first 5 partial sums b) Make a conjecture for a formula for the sum of the first n terms c) Use mathematical induction to prove your formula 
Math
Question 1 Write the first four terms of the sequence whose general term is given. an = 3n  1 Answer 2, 3, 4, 5 2, 5, 8, 11 2, 5, 8, 11 4, 7, 10, 13 3 points Question 2 Write the first four terms of the sequence whose general … 
Math PLEASE HELP PLEASE PLEASE PLEASE
Question 1 Write the first four terms of the sequence whose general term is given. an = 3n  1 Answer 2, 3, 4, 5 2, 5, 8, 11 2, 5, 8, 11 4, 7, 10, 13 3 points Question 2 Write the first four terms of the sequence whose general … 
Math
an = 3n  1 Answer 2, 3, 4, 5 2, 5, 8, 11 2, 5, 8, 11 4, 7, 10, 13 3 points Question 2 Write the first four terms of the sequence whose general term is given. an = 2(2n  3) Answer 6, 2, 2, 6 1, 1, 3, 5 2, 4, 6, 8 2, 2, … 
Math ( Can You check my Work?)
1.an = 3n  1 2. an = 2(2n  3) 3.an = 4^n 4.an = (2/3)^n 5. an = (1)^n(n + 5) 6. an = (1)^n + 1(n + 6) 7. an= n+3/2n1 8. a1 = 5 and an = an1  3 for n ≥ 2 9. a1 = 6 and an = 2an1 for n ≥ 2 10.a1 = 4 and an = 3an1 … 
Math
Sum of4th and the 6th terms of an a,p is 42 . While the sum of the 3rd and 9th terms of the same a.p is 52. Find the (a) first term (b)common difference (c) sum of the first ten terms of the progression. Solution 
Math
1.(A)(i)Show that 2+4+6+8+..+2n=n(n+1). (ii)Find the sum of the first 200 even numbers. (iii)Find the sum of the first 200 odd numbers. (B)(i)Use the formula at the beginning of the question to find the sum of the first 2n natural … 
math
The third term of a G.P is 24 and the sum of the first two terms is 288. If all the terms are positive,find a)the first term and the common ratio b)the sum of all the terms from 4th term to the 8th term 
Math
Please help me with my midterm review my teacher was out sick today and idk how much longer she will be but my midterms Thursday. She only helps people who she has seen done there midterm review and gotten over half of it right so …