The arithmetic sequence is
for
.
Find
th term of the arithmetic sequence.
Here
.
Common difference:
.
The formula for
th term of the arithmetic sequence:
.
(Subtitute
,
and
)
(Substitution:
)
(Multiply)
(Simplify)
Thus, the
th term of the arithmetic sequence is
.
The
th term of the arithmetic sequence is
.