i*i= -1 right?
Sqrt(-1) = i
i^2 =sqrt(-1) x sqrt(-1) = - 1 (you got it right)
i^3 = -1 x i = -i
i^4 =-1 x -1 = 1 Then the pattern repeats.
Yup correct.
√−1=i
i×i=√−1×√−1=√−12=−1
yes.