Use Summation Notation to Write the Sum $12 + 36 + 108 + \ldots + 8,748$

Multiple Choice

Use summation notation to write the sum. $12 + 36 + 108 + \ldots + 8,748$

A) $\sum _ { n = 1 } ^ { 7 } 12 ( 3 ) ^ { n - 1 }$
B) $\sum _ { n = 1 } ^ { 7 } 12 ( 3 ) ^ { n + 1 }$
C) $\sum _ { n = 1 } ^ { 6 } 12 ( 3 ) ^ { n - 1 }$
D) $\sum _ { n = 1 } ^ { 7 } 3 ^ { n - 1 }$
E) $\sum _ { n = 1 } ^ { 7 } 12 ( 3 ) ^ { n }$