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.

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.