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Let a, b, c be positive integers such that ba is an integer. If a, b, c are in geometric progression and the arithmetic mean of a, b, c is b + 2, then the value of a2+a−14a+1 is___

Answer» Let a, b, c be positive integers such that ba is an integer. If a, b, c are in geometric progression and the arithmetic mean of a, b, c is b + 2, then the value of a2+a14a+1 is___


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