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OpenStudy (anonymous):
Determine whether the sequence converges or diverges. If it converges, give the limit.
60, -10,5/3 ,5/18 , ...
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OpenStudy (cwrw238):
lets see if we have a common ratio here:
-10/60 = -1/6, 5/3 / -10 = -5/30 = -1/6
5/18 / 5/3 = -6
ok - are you sure you have the question right?
OpenStudy (cwrw238):
* 1/6
OpenStudy (cwrw238):
is the second term 10 , not -10?
OpenStudy (anonymous):
oh my bad!! it's -10 and -5/18
OpenStudy (cwrw238):
oh ok so r = -1/6
so we have a geometric sequence which oscillates
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OpenStudy (anonymous):
so is it converging with a limit of 0?
OpenStudy (cwrw238):
looks like but i'd have to check..
OpenStudy (anonymous):
okay let me know, please
OpenStudy (anonymous):
is that correct?
OpenStudy (cwrw238):
the sum to infinity is a / 1 - r = 60 /( 1 - (-1/6) = 60 / 7/6 = 360/7 = 51.43
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OpenStudy (cwrw238):
a GP with -1 < r < 1 converges to a limit
OpenStudy (anonymous):
these are the answer choices:
Diverges
Converges; 11100
Converges; 72
Converges; 0
OpenStudy (cwrw238):
converges 0 is correct the terms come very close to zero at infinity
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