If ∑n=0∞xn=3\sum_{n=0}^{\infty} x^n = 3∑n=0∞xn=3, what is the sum of the series ∑n=0∞(−x)n\sum_{n=0}^{\infty} (-x)^n∑n=0∞(−x)n?
3/2
3/4
2/3
1/2