Practice problem
Suppose a1=2a_{1} = 2a1=2 and a2=4a_{2} = 4a2=4. If the sequence is defined by the recursive formula an=an−1⋅an−2a_{n} = a_{n-1} \cdot a_{n-2}an=an−1⋅an−2, what is a4a_{4}a4?
101010
646464
323232
888
Type a concept, like “slope” or “photosynthesis”.
