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Mathematics
Sequences and Series
Exponential Sequences
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.
2 answers
a8 = a4 * r^4 = 108 * 3^4 = ____
a = 108/3^3 = 4
S5 = a(r^5-1)/(r-1) = ____
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