makmcduffie2924
08.12.2020 •
Mathematics
What is the explicit rule for the sequence?
10.5, 9, 7.5, 6, 4.5, 3, ...
an=12−1.5n
an=12.5−1.5n
an=11−1.5n
an=12+1.5n
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Ответ:
9514 1404 393
an=12−1.5n
Step-by-step explanation:
The first term is 10.5.
The common difference is ...
9 - 10.5 = -1.5
The n-th term can be described by ...
an = a1 +d(n -1)
an = 10.5 -1.5(n -1) = 10.5 -1.5n +1.5 . . . . eliminate parentheses
an = 12 -1.5n
Ответ: