SOLUTION: find the sum of the first nine terms of the geometric sequence: 8,-16,32,-64,128,...
Algebra.Com
Question 972330: find the sum of the first nine terms of the geometric sequence: 8,-16,32,-64,128,...
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
common ration , first term, 8.
You can look for the formula in a textbook or a reference manual:
The sum of the first n terms of geometric sequence, common ratio r, first term is:
Your series,
------simplify.
RELATED QUESTIONS
find the sum of the first nine terms of the geometric sequence
8, -16, 32, -64,... (answered by ikleyn)
Find the sum of the first ten terms of the sequence 128, -64, 32, -16,... (answered by jorel555)
Find the sum of the first 10 terms of the geometric series... (answered by fractalier)
Find the sum of the first 8 terms in the geometric series 1-4+16-64+...
(answered by richwmiller)
Find the sum of the first n terms of each geometric sequence.
S sub 6 ; 1 + 4 + 16 +... (answered by ikleyn)
what is the geometric sequence of... (answered by josgarithmetic)
Find the sum of the infinite geometric series, if possible.
64 + 32 + 16 + . . .
(a)... (answered by richard1234)
Given that the first 4 terms of a geometric sequence are 2, x, 32, and 128, find the... (answered by Alan3354)
Find the geometric series of the first 10 terms if the geometric sequence is 2, 4, 8,... (answered by greenestamps)