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Calculating the sum of a sequence -3-6, Calculating the sum of a sequence – Casio CLASSPAD 330 3.04 User Manual

Page 375

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Calculating the Sum of a Sequence

Perform the following steps when you want to determine the sum of a specific range of the
sequence of a recursion expression or a general term expression.

Example: To calculate the sum of the general term expression

a

n

E =

n

2

+ 2

n

– 1 in the

range of 2

n

10

S\

ClassPad Operation

(1) Start up the Sequence Editor.

• If you have another application running, tap

/ and then .

• If you have the Sequence application running, tap

and then [Sequence Editor].

(2)

Tap (or press)

, [Sequence RUN], [Calc], [3], [

n

,

a

n

], [

n

], C, , D, , , C,

[

n

,

a

n

], [

n

],

:, , , , [

n

,

a

n

], [

n

],

, .

(3)

Press

.

Tip

• For information about the syntax of the “

3” function, see “2-8 Using the Action Menu”.

6-3-6

Recursive and Explicit Form of a Sequence

Example: To obtain the

n

-th terms of a system of recursion formulas

a

n+

1

= 3

a

n

+

b

n

,

b

n+

1

=

a

n

+ 3

b

n

with the initial conditions

a

1

=2,

b

1

= 1