i⁹+ i¹⁹

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Question

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Anonymous · Accepted Answer

i⁹+ i¹⁹= i⁸.i +i¹⁸.i = (i²)⁴.i. (i²)⁹.i
= (-1)⁴.i + (-1)⁹.i (use i²= -1)
= i - i = 0

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