Geometric sequences
A
geometric sequence is a sequence of numbers each of which, after the first, is obtained by multiplying the preceding number a constant number called the
common ratio.. Thus, 3, 6, 12, 24, 48,... is a geometric sequence because each term is obtained by multiplying the preceding number by 2.
To solve exercises using geometric sequences you need the following formulas:
.
Find the
9 term of the geometric sequence where
2= 8 and 6 = 128
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