samkay2835 samkay2835

03-03-2021
Mathematics

contestada

what is the sum of the geometric sequence 1,3,9... If there are 14 terms?

Respuesta :

03-03-2021

Answer:

Step-by-step explanation:

[tex]s_n=\frac{a(r^n-1)}{r-1},\ a=initial,\ r=common\ ratio,\ n=term\ number\\ \\ s_{14}=\frac{1(3^14-1)}{2}\\ \\ s_{14}=2391484[/tex]

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