The seventh and tenth terms of a geometric sequence are $7$ and $21$, respectively. What is the $13$th term of this progression?
Question:
The seventh and tenth terms of a geometric sequence are $7$ and $21$, respectively. What is the $13$th term of this progression?
Answer:
Let's think step by step.

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The seventh and tenth terms of a geometric sequence are $7$ and $21$, respectively. What is the $13$th term of this progression?
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