Asked by Adam Abba Aja

The fourth term of an exponential sequence is 108 and the common ratio is 3. Calculate the values of the eight term and the sum of the first five terms of the sequence.
Answered by oobleck
a8 = a4 * r^4 = 108 * 3^4 = ____
a = 108/3^3 = 4
S5 = a(r^5-1)/(r-1) = ____
Answered by Adam Abba Aja
Pls can you share me the formula?