Practice problem
Suppose a1=2a_{1} = 2a1=2 and a2=3a_{2} = 3a2=3. We have a sequence that is described by an=an−1+2an−2a_n = a_{n-1} + 2a_{n-2}an=an−1+2an−2. What is a5a_{5}a5?
777
131313
272727
535353
Type a concept, like “slope” or “photosynthesis”.
