Write the First Five Terms of the Sequence Defined Recursively $a _ { 1 } = - 7 , a _ { k + 1 } = 3 a _ { k }$

Multiple Choice

Write the first five terms of the sequence defined recursively.Use the pattern to write the nth term of the sequence as a function of n.(Assume that n begins with 1.) $a _ { 1 } = - 7 , a _ { k + 1 } = 3 a _ { k }$

A) $a _ { n } = - 7 n ; - 7 , - 21 , - 63 , - 189 , - 567$
B) $a _ { n } = - 7 ( 3 ) ^ { n } ; - 21 , - 63 , - 189 , - 567 , - 1701$
C) $a _ { n } = ( - 21 ) ^ { n } ; - 7 , - 63 , - 189 , - 567 , - 1701$
D) $a _ { n } = ( - 21 ) ^ { n - 1 } ; - 21 , - 63 , - 189 , - 567 , - 1701$
E) $a _ { n } = - 7 ( 3 ) ^ { n - 1 } ; - 7 , - 21 , - 63 , - 189 , - 567$