Practice problem
Suppose that we have a sequence where an=11+an−1a_n = \frac{1}{1+a_{n-1}}an=1+an−11. If a3=2a_3 = 2a3=2, what is the value of a−1a_{-1}a−1, as a decimal?
−1.75-1.75−1.75
−0.5-0.5−0.5
−3-3−3
−1.33-1.33−1.33
Type a concept, like “slope” or “photosynthesis”.