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E-47
The following shows the calculation formula used for
Σ
calculations.
Σ
(
f
(
x
),
x
,
a
,
b
) =
f
(
a
) +
f
(
a
+1) + .... +
f
(
b
)
A
Syntax and Input
Σ
(
f
(
x
),
x
,
a
,
b
)
f
(
x
): Function of
x
(parameter variable specifi ed below)
x
: Parameter variable (Any letter from A through Z)
• If the variable name you specify here does not match the variable name
used within the function of
x
, the variable in the function will be treated as a
constant.
a
: Start point of calculation range
b
: End point of calculation range
•
a
and
b
are integers in the range of –1 × 10
10
<
a
<
b
< 1 × 10
10
.
• The step for this calculation is fi xed as 1.
Example:
Σ
( X + 1, X, 1, 5) = 20
B
z
– {MATH}
4
(
Σ
()
S
0
(X)
+1
ea
0
(X)
e
1
e
5
E
b
z
– {MATH}
4
(
Σ
()
S
0
(X)
+1,
a
0
(X)
,1,5)
E
A
Remarks
• Use of
Σ
( is supported in the COMP, SD, REG, and EQN Modes only.
• The following functions cannot be input for the
f
(
x
),
a
, and
b
parameters:
∫
(,
d
/
dx
(,
d
2
/
dx
2
(,
Σ
(. In addition, the Pol( and Rec( functions, and the random number functions cannot be
input for the
f
(
x
) parameter.
• You can interrupt an ongoing
Σ
calculation operation by pressing
o
.
k
Coordinate Conversion (Rectangular
↔
Polar)
Pol(, Rec(
Your calculator can convert between rectangular coordinates and polar coordinates.
o
o
Rectangular Coordinates (Rec) Polar Coordinates (Pol)