Check the forward differences of the sequence.
If
, then let
be the sequence of first-order differences of
. That is, for n ≥ 1,

so that
.
Let
be the sequence of differences of
,

and we see that this is a constant sequence,
. In other words,
is an arithmetic sequence with common difference between terms of 2. That is,

and we can solve for
in terms of
:



and so on down to

We solve for
in the same way.

Then



and so on down to


Second 1 because it isn't negative
Answer:
8 in
I have that is the correct answer
but iam not confident
Answer:
r = 1
Step-by-step explanation:
Direct variation describes a relation ship in which two variables are directly proportion and is represented as,
y = rx or

From the table,
