Question
Answer
$$(2i)^4=16$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}(2i)^4& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}16i^4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}16\end{aligned} $$ | |
| ① | $$ \left( 2i \right)^4 = 2^4i^4 = 16i^4 $$ |
| ② | $$ 16i^4 = 16 \cdot i^2 \cdot i^2 =
16 \cdot ( - 1) \cdot ( - 1) =
16 $$ |
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