Write the first three terms in the following sequences. identify them as arithmetic or geometric
a. a(n + 1) = a(n) − 5 for n ≥ 1 and a(1) = 9

Arithmetic sequence

Step-by-step explanation:

We are given that

A(1)=9

We have to find first three terms and identify the sequence is geometric or arithmetic.

Substitute n=1

Then, we get

For n=2

For n=3

When the difference of consecutive terms are constant then the sequence is arithmetic sequence.

Therefore, given sequence is arithmetic sequence.

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step-by-step explanation:

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