SOLUTION: The nth term of a geometric progression is 9(-2/3)^n. Find the first term and the common ratio.

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Question 1202407: The nth term of a geometric progression is 9(-2/3)^n. Find the first term and the common
ratio.
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
.

The common ratio is  -2%2F3.   It is absolutely clear from the expression.


The first term is, OBVIOUSLY, 9%2A%28-2%2F3%29 = (-2)*3 = -6.


It is clear from the formula   a%5Bn%5D = a%5B1%5D%2A%28-2%2F3%29%5E%28n-1%29  for the n-th term.

Solved.

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