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3 years ago

1. The explicit formula an = 2–5(n-1) represents an arithmetic sequence. Write the recursive

Mathematics

1 answer:

Ivahew [28]3 years ago

3 0

Answer:

$a_n=2,\:a_n=a_{n-1}-5$

Step-by-step explanation:

If you map the sequence out, you get the following values:

a = 1, a(n) = 2

a = 2, a(n) = -3

a = 3, a(n) = -8

As you can see, the first term is 2 and the sequence is decreasing by 5 each time. Therefore, the answer is D.

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yaroslaw [1]

Answer:

The nth term of the geometric sequence 7, 14, 28, ... is:

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Step-by-step explanation:

Given the geometric sequence

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We know that a geometric sequence has a constant ratio 'r' and is defined by

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$a_n=7\cdot \:2^{n-1}$

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3 years ago

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Step-by-step explanation:

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What's the answer to all of these questions