Fourth Power Rule

Reference > Algebra: Imaginary Numbers

Description

The Fourth Power Rule states that:

\({i}^{4}={i}^{2}{i}^{2}=(-1)(-1)=1\)
Examples
\[{i}^{4}+2\]
1
Use Fourth Power Rule: \({i}^{4}={i}^{2}{i}^{2}=(-1)(-1)=1\)
\[1+2\]

2
Simplify
\[3\]

Done