Answer:
1,456
Step-by-step explanation:
The sum of n terms of a geometric sequence with first term a1 and common ratio r is given by ...
Sn = a1·(r^n -1)/(r -1)
For your series with a1=4, r=3, and n=6, the sum is ...
S6 = 4·(3^6 -1)/(3 -1) = 2·728 = 1,456
