Divide any term in the sequence by the previous term. That is the common ratio of a geometric series.
If the series is defined in the form of a recurrence relationship, it is even simpler.
For a geometric series with common ratio r, the recurrence relation is
Un+1 = r*Un for n = 1, 2, 3, ...
104, -52, 26, -13,
Find the 7th term of the geometric sequence whose common ratio is 1/2 and whose first turn is 5
The geometric sequence with three terms with a sum of nine and the sum to infinity of 8 is -9,-18, and 36. The first term is -9 and the common ratio is -2.
The 99th term would be a times r to the 98th power ,where a is the first term and r is the common ratio of the terms.
1/8
It is 4374
Find the 7th term of the geometric sequence whose common ratio is 1/2 and whose first turn is 5
The ratio can be found by dividing any (except the first) number by the one before it.
It is 0.2
The geometric sequence with three terms with a sum of nine and the sum to infinity of 8 is -9,-18, and 36. The first term is -9 and the common ratio is -2.
The 99th term would be a times r to the 98th power ,where a is the first term and r is the common ratio of the terms.
1/8
nth term Tn = arn-1 a = first term r = common factor
Formula for the nth term of general geometric sequence tn = t1 x r(n - 1) For n = 2, we have: t2 = t1 x r(2 - 1) t2 = t1r substitute 11.304 for t2, and 2.512 for t1 into the formula; 11.304 = 2.512r r = 4.5 Check:
-5,120
It is 4374
a = -4 r = -3
The Fibonacci sequence can be used to determine the golden ratio. If you divide a term in the sequence by its predecessor, at suitably high values, it approaches the golden ratio.