

MCQOPTIONS
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1. |
The value of the sum \[\sum\limits_{n=1}^{13}{\left( {{i}^{n}}+{{i}^{n+1}} \right)};\] where \[i=\sqrt{-1}\] is: |
A. | \[i\] |
B. | \[-i\] |
C. | \[0\] |
D. | \[i-1\] |
Answer» E. | |