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frew@mclean.com > nth
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Determine the nth term of a geometric sequence given the first term, and ratio. The formula is a_n = a_1 times r ^(n - 1)


nth(3.0, 5.0, 9) → 1171875.0
nth(3.0, 2.0, 8) → 384.0
nth(4.0, 3.0, 8) → 8748.0

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public double nth(double a_1, double r, int n) { }

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