Asked by plshelp
Find the third term and the sum of the first 30 terms of the geometric progression 2, 3, ...
Answers
Answered by
oobleck
clearly, r = 3/2, so the next term is 9/2
And, as always, the sum of the first n terms is
Sn = a (r^n-1)/(r-1)
So plug in your numbers.
And, as always, the sum of the first n terms is
Sn = a (r^n-1)/(r-1)
So plug in your numbers.
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