Question

Which answer is the explicit it rule for the sequence 12.5, 11,9.5,8,6.5,5

A. an=14+1.5n

B. An=13-1.5n

C. an=14.5-1.5n

D. an=14 -1.5n

Answer 1

D. an = 14 - 1.5n

Explanation:

Selection D is the only one that works to give a1 = 12.5.