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| rev | Admin | (Created page with "'''Solution: A''' <math display = "block"> \begin{aligned} & 640(1+i)^n=1000 \\ & (1+i)^n=1.5625 \\ & v^n=0.64 \\ & 640=F \frac{i}{2} a_{\overline{n} i}+F v^n \\ & 640=F\left[\frac{i}{2} \frac{1-v^n}{i}+v^n\right] \\ & 640=F\left[\frac{1}{2}(1-0.64)+0.64\right] \\ & F=780.49\end{aligned} </math> {{soacopyright | 2023 }}") | Nov 19'23 at 22:46 | +325 |