If f(x)=2x-1 just plug in the 3 where x is. So it would be 2(3)-1=5
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


Ten thousand-80000
hundred-81100
ten-81070
thousands-81000
Answer:
No
Step-by-step explanation:
no