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])
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