3 years ago

Evaluate the sum of the following finite geometric series. 5+15+45 +135+ . . . + 1215 Sn=1

1 answer:

Nata [24]3 years ago

5 0

Answer:

1820

Step-by-step explanation:

The sum of the first n terms of a geometric series with common ratio r and first term a is:

a(1-r^n)/(1-r). Plugging this in 5(1-3^6)/(1-3)=1820

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