SOLUTION: Does the following infinite geometric series diverge or converge? Explain. 7+21+63+189

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Question 448458: Does the following infinite geometric series diverge or converge? Explain. 7+21+63+189
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi, Previously posted
7+21+63+189... = sum%28+7%283%29%5E%28n-1%29%2C+n=1%2C+6+%29
or
where r = 3
sum%28+7%2A%283%29%5E%28n-1%29%2C+n=1%2C+infinity+%29+=+7%28%281-3%5En%29%2F%28-2%29%29
r = 3 >1 Series diverges