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| rev | Admin | (Created page with "'''Solution: C''' <math display = "block"> \begin{aligned} 2000 & =X(1.08)^{14}+X(1.03)(1.08)^{13}+X(1.03)^2(1.08)^{12}+\cdots+X(1.03)^{14} \\ & =X \frac{1.08^{14}-1.03^{15} / 1.08}{1-1.03 / 1.08} \\ & =32.284 X \\ X & =61.95\end{aligned} </math> {{soacopyright | 2023 }}") | Nov 18'23 at 19:37 | +275 |