Hello! Here are the recursive definitions of the given sequence:
A) The sequence is increasing by 7 for each term, so the recursive definition can be written as:
a1 = 3
an = an-1 + 7
So, the recursive definition of the sequence is: 3, 3+7=10, 10+7=17, 17+7=24, ...
B) The second option given, "anan-1 + 10 a1 = 3" is not a recursive definition of the sequence.
C) The third option given, "San = 10an-1" is also not a recursive definition of the sequence because it uses a different variable 'S' instead of 'a'.