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MATH / Consider the geometric series 4+(12)/(a)+(36)/(a²)+⋯. If the sum is a perfect square, what is the smallest possible value of a where a is a positive integer? · Discussion

Discussing Consider the geometric series 4+(12)/(a)+(36)/(a²)+⋯. If the sum is a perfect square, what is the smallest possible value of a where a is a positive integer? · MATH

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