A geometric sequence is a sequence where each term is found by multiplying the previous term by a constant ratio r. The nth term is the first term times the common ratio raised to the (n−1) power.
Find the 5th term of the sequence 2, 6, 18, 54, ...
a₁ = 2, r = 3. a₅ = 2 × 3⁴ = 2 × 81 = 162
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