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65
6
Σ
(k
2
– 3k + 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() ak , k ,
α
,
β
, n )
Σ calculation is the calculation of the partial sum of sequence ak, using the
following 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)
w
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
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