WOLFRAM
|
DEMONSTRATIONS PROJECT
Arithmetic Series
n
n
1
0
S
n
1
2
n
(
a
n
+
a
1
)
5
5
S
n
1
+
2
+
3
+
4
+
5
+
6
+
7
+
8
+
9
+
1
0
T
o
f
i
n
d
t
h
e
s
u
m
o
f
t
h
e
t
e
r
m
s
i
n
a
n
a
r
i
t
h
m
e
t
i
c
s
e
q
u
e
n
c
e
,
i
t
i
s
p
o
s
s
i
b
l
e
t
o
c
a
l
c
u
l
a
t
e
t
h
e
s
u
m
i
n
s
t
e
a
d
o
f
s
u
m
m
i
n
g
a
l
l
t
h
e
i
n
d
i
v
i
d
u
a
l
t
e
r
m
s
.