A geometric sequence is : a•r^n while a quadratic sequence is a• n^2 + b•n + c
So the answer is no, unless we are talking about an infinite sequence of zeros which strictly speaking is both a geometric and a quadratic sequence.
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This is a geometric progression with a factor of -10, so 0.562.
It is a geometric progression with common ratio 0.5
15. It's a Geometric Progression with a Common Ratio of 1/5 (or 0.2).
Sounds like a Geometric Progression eg 1-3-9-27-81 etc
Yes, that's what a geometric sequence is about.