SOLUTION: Find the sum of the rest 20 terms of the following series: 4 + 12 + 36 + 108...

SOLUTION: Find the sum of the rest 20 terms of the following series: 4 + 12 + 36 + 108...

Algebra.Com

Question 361815: Find the sum of the rest 20 terms of the following series: 4 + 12 + 36 + 108...
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
4+12+36+108+... = 4(1+3+9+27 +...)
=
= .
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