Question
Answer
$$9i^{56}=9$$
Explanation
| $$ \begin{aligned}9i^{56}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9\end{aligned} $$ | |
| ① | $$ 9i^{56} = 9 \cdot i^{4 \cdot 14 + 0} =
9 \cdot \left( i^4 \right)^{ 14 } \cdot i^0 =
9 \cdot 1^{ 14 } \cdot 1 =
9 \cdot 1 $$ |
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