It is 4374
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The formula to find the sum of a geometric sequence is adding a + ar + ar2 + ar3 + ar4. The sum, to n terms, is given byS(n) = a*(1 - r^n)/(1 - r) or, equivalently, a*(r^n - 1)/(r - 1)
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.
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.
An arithmetic sequence.
Find the 7th term of the geometric sequence whose common ratio is 1/2 and whose first turn is 5