# Let a, b, c be positive integers such that b/a is an integer.

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Let a, b, c be positive integers such that b/a 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-14/a+1 is_____

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$(b/a-1)^2=\frac{6}{a}$

⇒ a = 6

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