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astra-53 [7]
3 years ago
5

What is the explict formula for the arithmetic sequence -7.5,-9,-10.5,-12

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
8 0

Answer:

<u>x = -7.5 - 1.5(n−1) </u>

Step-by-step explanation:

the explicit formula for the arithmetic sequence has the form

x = a + d(n−1)

a is the first term and d is the common difference

The given arithmetic sequence is

-7.5,-9,-10.5,-12

The first term is -7.5

d = common difference = -9 - (-7.5) = -1.5

∴ x = -7.5 - 1.5(n−1)

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