6 summation ( σ ) calculations, Kexample σ calculation – Casio fx-9750G PLUS User Manual
Page 93
65
6
Σ
(
k
2
– 3
k
+ 5)
k = 2
3-6 Summation (
Σ) Calculations
[OPTN]-[CALC]-[
Σ(]
To perform
Σ calculations, first display the function analysis menu, and then input
the values shown in the formula below.
6
(g)3(
Σ()
a
k
,
k
,
α
,
β
,
n
)
Σ calculation is the calculation of the partial sum of sequence
a
k
, using the
following formula.
k
k
k
k
k
Example
Σ Calculation
Example
To calculate the following:
Use
n
=
1
as the distance between partitions.
Input sequence
a
k
.
A
K4
(CALC)6(g)3(
Σ()aKx-daK+f,
Input variable used by sequence
a
k
.
a
K,
Input the initial term of sequence
a
k
and last term of sequence
a
k
.
c,g,
Input
n
.
b)
w
Distance between partitions
Last term of sequence
a
k
Initial term of sequence
a
k
Variable used by sequence
a
k
β
Σ
(
a
k
, k,
α, β, n) ⇒
Σ
a
k
k =
α
β
S =
a
α
+
a
α
+1
+........+
a
β
=
Σ
a
k
k =
α