What is the recursive formula of the geometric sequence? 1∕2, 3∕4, 9∕8, 27∕16, ... A) a1 = 1∕2; an = an – 1 ⋅ (3∕2) for n ≥ 2
B) a1 = 1∕2; an = an – 1 ⋅ (2) for n ≥ 2
C) an = (1∕2) ⋅ (1∕2)n – 1 for n ≥ 1
D) an = (2) ⋅ (1∕2)n – 1 for n ≥ 1