Question
Answer
$$i^{86}=-1$$
Explanation
| $$ \begin{aligned}i^{86}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-1\end{aligned} $$ | |
| ① | $$ i^{86} = i^{4 \cdot 21 + 2} =
\left( i^4 \right)^{ 21 } \cdot i^2 =
1^{ 21 } \cdot (-1) =
-1 = -1 $$ |
This page was created using
Complex Expression calculator