# Mark the Correct alternative in the following:The value of (i5 + i6 + i7 + i8 + i9)/(1 + i) isA. B. C. 1D.

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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