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1 answer:
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Step-by-step explanation:
For a geometric sequence,
1. The sequence is :
3, 13, 23, 33,...
It is not geometric. It is false
2. The sequence is :
5, -25, 125, -625
So, the sequence is geometric as the common ratio is same. It is true.
Step-by-step explanation:
Given:
or
Let and
Substituting these into our given equation, we get
Dividing both sides by we get
which we recognize as an equation for an ellipse.