Question

i^7? wants it in a+bi form whatever that is :S

Answer 1

=0 - i

Answer 2

\[i = \sqrt{-1}, i^{2} = -1, i^{3} = -i, i^{4}= 1, i^{5} = i.....\]
these repeats after the fourth power, think you can figure out what the 7th power is?