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| rev | Admin | (Created page with "'''Solution: D''' <math display = "block">\begin{aligned} & O B_{n-1}=R a_1=1144.5=R v \\ & P_{n-4}=R v^{n-(n-4)+1}=R v^5=865 \\ & \frac{R v^5}{R v}=v^4=\frac{865}{1144.5}=0.75579 \\ & v^4=0.75579, \quad v=0.93240, \quad i=0.07251 \\ & I_1=X(0.07251)=797.50 \\ & X=10,999.02\end{aligned}</math> {{soacopyright | 2023 }}") | Nov 19'23 at 13:39 | +321 |