25 lines
443 B
C#
25 lines
443 B
C#
using System;
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class GeometricProgression : Progression
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{
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private int p0;
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private int q;
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public GeometricProgression(int p0, int q)
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{
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this.p0 = p0;
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this.q = q;
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}
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public override int GetElement(int k)
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{
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return p0 * (int)Math.Pow(q, k - 1);
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}
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public override int Sum(int n)
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{
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if (q == 1) return p0 * n;
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return p0 * (int)((Math.Pow(q, n) - 1) / (q - 1));
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}
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}
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