An infinite geometric progression $a_1,a_2,...$ has the property that $a_n= 3(a_{n+1}+ a_{n+2} + ...)$ for every n $\geq$ 1. If the sum $a_1+a_2+a_2...+=32$, then $a_5$ is
- 1/32
- 2/32
- 3/32
- 4/32
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