(3)What is the explicit rule for the sequence?
10.5, 9, 7.5, 6, 4.5, 3, ...

Answer:
d
Step-by-step explanation:
\a^_{n}=10.5+(n-1)(9-10.5)
=10.5+(n-1)(-1.5)
=10.5-1.5n+1.5
=12-1.5 n