The sum of the terms in an infinite geometric series is 15, and the sum of their squares is 45.  Find the first term.
Question:
The sum of the terms in an infinite geometric series is 15, and the sum of their squares is 45.  Find the first term.
Answer:
Let's think step by step.

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The sum of the terms in an infinite geometric series is 15, and the sum of their squares is 45.  Find the first term.
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