SOLUTION: The first term and common ratio of a geometric sequence is given below. What are the first five terms of the sequence? a1=5 R= -4 Hint an= a1r^n-1

Algebra ->  Linear-equations -> SOLUTION: The first term and common ratio of a geometric sequence is given below. What are the first five terms of the sequence? a1=5 R= -4 Hint an= a1r^n-1      Log On


   

Question 616168: The first term and common ratio of a geometric sequence is given below. What are the first five terms of the sequence? a1=5 R= -4 Hint an= a1r^n-1
Found 2 solutions by ewatrrr, stanbon:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi, 

geometric sequence: a%5B1%5D=5  R= -4  

 a%5Bn%5D=+a%5B1%5D%2Ar%5E%28n-1%29

 a%5B1%5D=+5

 a%5B2%5D=+5%2A-4

 a%5B3%5D=+5%2A%28-4%29%5E2+

 a%5B4%5D=+5%2A%28-4%29%5E3

 a%5B5%5D=+5%2A%28-4%29%5E4

first five terms of the sequence are: 5,-20,80,-320, 1280,...

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The first term and common ratio of a geometric sequence is given below. What are the first five terms of the sequence? a1=5 R= -4 Hint an= a1r^n-1
-----
5
5*(-4) = -20
(-20)*(-4) = 80
80*(-4) = -320
(-320)(-4) = 1280
=====================
Cheers,
Stan H.
================