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| rev | Admin | (Created page with "'''Solution: A''' <math display = "block"> -\frac{P^{\prime}\left(i\right)}{P(i)}=\frac{1500\left(1+i\right)^{-4}-4000\left(1+i\right)^{-5}}{100+500\left(1+i\right)^{-4}-1000\left(1+i\right)^{-4}} </math> {{soacopyright | 2023 }}") | Nov 20'23 at 15:02 | +234 |