The value of sum _ n=1 ^ 13 (i^ n +i^ n+1 ) where equals

Mathematics · JEE Main · NTA Exams — Complex Numbers and Quadratic Equations

The value of sum \(\sum_{n=1}^{13}\left(i^{n}+i^{n+1}\right)\)where equals

1. i
2. i – 1
3. –i
4. 0

Answer

(B) i – 1

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