Casio CFX-9850G PLUS, User'S Manual & Technical Reference

Page: 94 / 486

66
3 - 6
Summation
(
Σ
)
Calculations
• You can use only one variable in the function for input sequence
a
k
.
• Input integers only for the initial term of sequence
a
k
and last term of sequence
a
k
.
• Input of
n
and the closing parentheses can be omitted. If you omit
n
, the
calculator automatically uses
n
= 1.
k k
k k
k
Σ
Calculation Applications
• Arithmetic operations using
Σ
calculation expressions
Expressions:
Possible operations:
S
n
+ T
n
, S
n
– T
n
, etc.
• Arithmetic and function operations using
Σ
calculation results
2
×
S
n
, log (S
n
), etc.
• Function operations using
Σ
calculation terms (
a
k
,
k
)
Σ
(sin k , k , 1, 5), etc.
• Note that you cannot use a Solve, differential, quadratic differential,
integration, maximum/minimum value or
Σ
calculation expression inside of a
Σ
calculation term.
• Make sure that the value used as the final term
β
is greater than the value
used as the initial term
α
. Otherwise, an error will occur.
• To interrupt an ongoing
Σ
calculation (indicated when the cursor is not on the
display), press the
A
key.
n n
S
n
=
Σ
a
k
, T
n
=
Σ
b
k
k = 1 k = 1