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77
3-7 Σ Calculations
To perform Σ calculations, first display the function analysis menu, and then input the
values shown in the formula below.
6(g)3(Σ() ak , k ,
α
,
β
, n )
Σ calculation is the calculation of the partial sum of sequence {
ak}, using the follow-
ing formula.
kk
kk
k Example Σ Calculation
Example To calculate the following:
Use n = 1 as the distance between partitions.
Input sequence {
ak}
AK4(CALC)6(g)3(Σ()
aKx-daK+f,
Input variable used by sequence {
ak}
aK,
Input the initial term of sequence {
ak} and last term of sequence {ak}.
c,g,
Input n.
b)
Distance between partitions
Last term of sequence {
ak
}
Initial term of sequence {
ak
}
Variable used by sequence {
ak
}
β
Σ
(ak, k,
α
,
β
, n) =
Σ
ak
k = α
β
S = a
α
+ a
α
+1
+........+ a
β
=
Σ
ak
k = α
6
Σ
(k
2
– 3k + 5)
k = 2
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