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What is the first A term in the geometric sequence: A, -2, 6, - 18,--?​

Answer 1

Answer:

$\color{pink}\text{Answer}$

In mathematics, a geometric progression, also known as a geometric sequence, is a sequence of non-zero numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio. ... Similarly 10, 5, 2.5, 1.25, ... is a geometric sequence with common ratio 1/2.