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in Mathematics by (71.8k points)

If A = [(i, 0, 0), (0, i, 0), (0, 0, i)], i = -1, then An = I where I is unit matrix when n = ...

(a) 4p + 1 

(b) 4p + 3 

(c) 4p 

(d) 4p + 2

1 Answer

+1 vote
by (75.3k points)
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Best answer

The correct option (c) 4p

Explanation:

A = iI

An = inIn = inI = I if n = 4p

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