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

Answer 1

You should have done this:

So what are the terms of your sequence?
2, -3, -8, ....
What do I notice about the terms?
Each term is 5 less than its previous term. Well, there it is!
a(n) = a(n-1) - 5 , for n > 1 , and a(1) = 2

The definition for the initial term is essential.

Answer 2

since 5(n-1) subtracts 5 when n increases by 1,
a_n = a_(n-1) - 5
now, what is a_1 ?

Answer 3

Lesson 4: Formulas for Arithmetic Sequences
1. d
2. a,f
3. b

Answer 4

star four! is 100% CORRECT

Answer 5

Star four! is still correct as of 2020 :)

Answer 6

Star four is still correct as of today.
1.D
2.A.F
3.B

Answer 7

yep its right

Answer 8

star four still correct 10/15/21

Answer 9

still correct 10/19/2021

Answer 10

d, af, b is still correct

Answer 11

Star four! is still correct in 2022.