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20
Advanced Keyboard/CALCULUS USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
Find the partial sum of a series, ∑ 1/X, for the first 10 terms.
1. Make sure the SET UP to rectangular mode by pressing 2ndF SET UP ,
E (COORD) 1 (Rect). Press 2ndF QUIT to exit the SET UP menu.
2. First find the sequence of the first 10 terms of series ∑ 1/X by first pressing
CL 2ndF LIST A (OPE) 5 (seq
( ). Enter the generator 1/X by
pressing 1
÷ X/θ/T/n
,
. Enter the lower and upper bounds for the
sequence by pressing 1
,
1 0
)
. Find the sequence by pressing
ENTER . Press to see more of the sequence.
3. Find the partial sum of the first 10 terms by pressing 2ndF LIST
6 (cumul) and pressing 2ndF ANS ENTER . Press to move right
in the sequence of partial sums until the last term is seen. The partial sum
of the first 10 terms is 2.9289.
PARTIAL SUM OF A SERIES
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