sferguson sferguson
  • 03-07-2017
  • Mathematics
contestada

Solve by unfolding: a0=2, and, n>=1, a_n=7a_n-1.

Respuesta :

altavistard
altavistard altavistard
  • 03-07-2017
We are told that the first term is 2.  The next term is 7(2) = 14; the third term is 7(14) = 98.  And so on.  So, the first term and the common ratio (7) are known.

The nth term of this geometric series is a_n = 2(7)^(n-1).

Check:  What is the first term?  We expect it is 2.  2(7)^(1-1) = 2(1) = 2.  Correct.

What is the third term?  We expect it is 98.  2(7)^(3-1) = 2(7)^2 = 98.  Right.
Answer Link

Otras preguntas

A triangle has vertices P(1, 3), Q(3, 5), and R(6, 2). The slope of the median to QR is a. 1/7 b. -1/2 c. 1 Can you lead me through the steps cuz i don't get
1. Determine the magnitude of the resultant force acting on the plate and its direction, measured counter-clockwise from the positive x axis. F1 = 900 N F2 = 7
Is it fair to judge people by their Physical Appearance?
What is the solution to this system of linear equations? x − 3y = −2 x + 3y = 16 (7, 3) (3, 7) (−2, −3) (−3, −2)
as immigrants arrived from many nations, why did it become necessary to restrict who and how many came to America
How many fifths are in 2 3/5
If a cheetah is a big cat than what else is a big cat
In the nineteenth century why is it more necessary for art to provide accurate representation of life and objects
What are 3 types of fossil fuels
Which food combination contains the most salt and sugar? A-a burger and cola B-cereal and milk C-pasta and juice D-salad and soup