Question

if i = sq root of -1
what is the value of i^4

Answer 1

1

Answer 2

\[
\sqrt{-1}=i\implies i^2=-1
\]

Answer 3

\[
i^4 = (i^2)^2=(-1)^2
\]

Answer 4

\[i = \sqrt{-1}\]\[i^2 = -1\]\[i^4 = (i^2)^2 = (-1)^2 = \boxed{1}\]

Answer 5

\[
-1\times -1 = ?
\]

Answer 6

1

Answer 7

thanks

Answer 8

You're welcome.