Identify the recursive formula for the following sequence:
1/2, 1 1/2, 3 1/2, 7 1/2...

Answer:
C
Step-by-step explanation:
The problem is where does n start?
a1 = 1/2
a2 = 2*(a1) + 1/2
a2 = 2*(1/2) + 1/2
a2 = 1 + 1/2
a2 = 1 1/2
=========
a3 = 2*a2 + 1/2
a3 = 2*(1 1/2) + 1/2
a3 = 3 + 1/2
a3 = 3 1/2
==============
a4 = 2(3 1/2) + 1/2
a4 = 7 + 1/2
a4 = 7 1/2
==============
an = 2*a_(n-1) + 1/2
The answer is C