| $$ \begin{aligned}\frac{10000(-i\cdot100)}{10000+(-i\cdot100)}& \xlongequal{ }\frac{-1000000i}{10000+(-i\cdot100)} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{10000-1000000i}{10001}\end{aligned} $$ | |
| ① | Divide $ \, -1000000i \, $ by $ \, 10000-100i \, $ to get $\,\, \dfrac{10000-1000000i}{10001} $. ( view steps ) |