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The first four terms in the sequence are:
12
13.5
15
16.5
an = 1.5 + a(n-1)
What are the first four terms in the sequence?
12
13.5
16
19.5
12
13.5
15
16.5
12
13.5
16.5
21
12
13.5
15.5
18
12
13.5
15
16.5