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Substitution

Let a, b, c, ...

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Let a, b, c, be positive integers less than 10 such that {(100a +10b+ c)}^2 = {(a + b + c)}^5, what is the value of (a x b- c)?

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a, b, c

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a

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Q. Let a, b, c be positive integers such that

\frac{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

\frac{a^{2} + a - 14}{a + 1}

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