Write a recursive definition for the sequence 8,6,4,
a1 = 8; an= an-1 - 2
a1 = 2: an=an–1 +6
a1 = 8; an = an-1 + 2
a1 = 2; an= an-1 +8

write an explicit formula for the sequence -3, 1, 5,
an=-3 + 4(n-1)
an=-3 + 4n
an=-3 + (n - 1)
an=-3 + 4(n + 1)

Step-by-step explanation:

1. The first step in problem solving is to look at the given information. Here, you can see that each number in the sequence is 2 less than the one before it.

In the expression ...

  an = an-1 - 2

the term an-1 means the previous term, the term just before term an. So, this equation means the term of the sequence is 2 less than the one before it. Since this matches the description of the sequence, this recursive relation is part of the correct answer. (The other part is the definition of the first term of the sequence: a1 = 8.)

The recursive definition is ...

__

2. The given sequence has first term a1 = -3, and common difference d = 4. That is, each term is 4 more than the previous one. The explicit formula for an arithmetic sequence is ...

  an = a1 +d(n -1)

Filling in the given values gives you the explicit formula ...

answer: what do you mean

hello, sorry being so rude after all that fighting i found it kind of funny, so as me saying sorry here is an answer!

since the table showed her that   2km = 2000m.

to determine, how many km in 2000m, she would divide by 1000.

= 2000 / 1000 = 2 km.

similarly, for 8000m = 8000 / 1000 = 8 km

cheers to savings

~

your pal papaguy