Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.
| rev | Admin | (Created page with "'''Solution: B''' <math display = "block"> \begin{aligned} & 1000 \cdot a_{20 \mid i}=\frac{600}{i}+\frac{600 v^{10}}{i} \\ & 5\left(\frac{1-v^{20}}{i}\right)=\frac{3}{i}\left(1+v^{10}\right) \\ & 5-5 v^{20}=3+3 v^{10} \\ & 0=5 v^{20}+3 v^{10}-2 \\ & \text { Let } x=v^{10}=\frac{-3 \pm \sqrt{9+4(5)(2)}}{2(5)}=\frac{-3 \pm 7}{10}=0.4 \Rightarrow i=9.59582 \% \\ & X=\frac{600}{0.0959582}(1+0.4)=8753.8\end{aligned} </math> {{soacopyright | 2023 }}") | Nov 18'23 at 19:18 | +452 |