Answer:
Step-by-step explanation:
A]
Each term goes down by 12 from the previous term. The sequence is arithmetic - B.
B]
The correct recursive function is
An = A_(n-1) - 12
which means that the correct answer is B
C]
The first term, if that is what your nomenclature means, is 41.
summation
This symbol is the summation symbol
It means to sum what comes after it
