Q. 333.7( 3 Votes )

Mark the Correct alternative in the following:

The value of (i5 + i6 + i7 + i8 + i9)/(1 + i) is

A.

B.

C. 1

D.

Answer :

We know that

i4n+1 = i


i4n+2 = i2 = -1


i4n+3 = i3 = -i


i4n+4 = i4 = 1


i5 + i6 + i7 + i8 + i9 = i + (-1) + (-i) + 1 + i


= i




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