Sharp EL-5160S, Operation Manual

Page: 134 / 188

E-23
Note: Parameters are entered in the following way:
WriteView editor:
d
(function)
–
dx
|
x
=
value of
x
[, minute interval]
Line editor:
d
/
dx
(function, value of
x
[, minute interval])
∑
Function
The
∑
function returns the cumulative sum of a given
expression from an initial value to an end value in
NORMAL mode.
Performing
∑
calculations
1. Press
@ I
.
2. Specify the following parameters: initial value, end
value, function with variable
x
, and increment (
n
).
You do not need to specify the increment. If the
increment is not specifi ed, the default value of
n
= 1
will be used.
3. Press
=
.
5
∑
x
= 1
(
x
+
2)
j @ I
1
r
5
r
; X +
2
n
=
1
=
25
.
n
=
2 l l H
2
=
15
.
o
j @ I ; X +
2
H
1
H
5
) = 25
.
l l H
2
=
15
.
Note: Parameters are entered in the following way:
WriteView editor:
end value
Σ
(function[, increment])
x =
initial value
Line editor:
Σ
(function, initial value, end value[, increment])