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# Just want too make sure I am right

+1
191
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i*i= -1 right?

Guest Jul 25, 2017
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#1
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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.

Guest Jul 25, 2017
#2
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Yup correct.

MaxWong  Jul 25, 2017
#3
+20
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$$\sqrt{-1}=i$$

$$i \times i = \sqrt{-1} \times \sqrt{-1} = {\sqrt{-1}}^{2} = -1$$

yes.

PkmnQ  Jul 26, 2017

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