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OpenStudy (ketz):
explain why j2 = -1 and not 1?
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OpenStudy (anonymous):
i believe the definition comes from the complex variable plane, where Im is the y axis and x is Re, then magnitude of a unit vector along -1 on Im axis is defined as sqrt(-1) I'm not sure if that's correct though, look up complex plane
OpenStudy (anonymous):
Is it *i* in place of *j*??? @ketz ... It should be... 'i' is the positive square root of -1...
OpenStudy (ketz):
yes j instead of i...
OpenStudy (anonymous):
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