A geometric sequence, also called geometric progression, is a number sequence with a common ratio between successive terms. A term in a geometric sequence can be found by multiplying the previous one by a non-zero and fixed number (a common ratio).
• geometric sequence: a sequence with a common ratio between successive terms.
• the nth term, tn ,of a geometric sequence:
where, tn : nth term
t1 : first term
r : common ratio
Geometric sequence formula
Consider the geometric sequence: 2, 6, 18, 54, … .
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