Question

Write a linear equation that represents the arithmetic sequence 12,6,3,1.5

Answer 1

Use the formula
a
n
=
a
1
r
n
−
1
a
n
=
a
1
r
n
-
1
to identify the geometric sequence.
a
n
=
12
2
n
−
1
a
n
=
12
2
n
-
1
Hope this helps!