Level:
Project ID:
1003108702
Accepted:
1
Clonable:
0
Easy:
1
Use summation notation to express the given infinite series.
\[ -1+2-4+8-16+\dots \]
\( \sum\limits_{n=1}^{\infty} (-1)^n\cdot2^{n-1} \)
\( \sum\limits_{n=1}^{\infty} (-1)^{n-1}\cdot2^{n-1} \)
\( \sum\limits_{n=1}^{\infty} (-1)^{n+1}\cdot2^{n-1} \)
\( \sum\limits_{n=1}^{\infty} (-1)^n\cdot2^{n+1} \)
\( \sum\limits_{n=1}^{\infty} (-1)^n\cdot2^{n} \)