Casio ClassPad 300 PLUS - Manual (Page 320)

20050501
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
u ClassPad Operation
(1) Start up the Sequence Editor.
• If you have another application running, tap m and then H.
• If you have the Sequence application running, tap O and then [Sequence Editor].
(2) Tap (or press) O, [Sequence RUN], [Calc], [Σ], [ n , a
n ], [ n ], {, 2, +, 2, [ n , a
n ],
[ n ], -, 1, ,, [ n , a
n
], [ n ], ,, 2, ,, 1, 0, and then ).
(3) Press E.
Tip
• For information about the syntax of the “
Σ” function, see “2-7 Using the Action Menu”.
6-3-6
Recursive and Explicit Form of a Sequence