Q. 155.0( 1 Vote )

Mark the Correct alternative in the following:

If a = 1 + i, then a2 equals

A. 1 – i

B. 2i

C. (1 + i) (1 – i)

D. i – 1.

Answer :

a2 = (1 + i)(1 + i)

= 12 + 2i + i2


= 1 – 1 + 2i


= 2i

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