Solve the problem.The annual population density of a species of insect after n years is modeled by a sequence. Suppose that the initial density of insects is 636 with r = 0.8. Write a recursive sequence that describes this data, where an denotes the insect density during year n.
A. an = 0.8 an+1 , a1 = 318
B. an = 0.8 an-1 , a1 = 636
C. an = 
, a1 = 636
D. an = 0.8 + an-1 , a1 = 636
Answer: B
Mathematics
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