214
CHAPTER 9
Press
Ï
S
=
P
Å
(
1
+
Å
I
)
Å
N >.
4. Press
®
. (The variable input screen will appear.)
5. To input each known value:
Press 15000
®
10000
®
≥ 5
®
.
6. Move the cursor to “I” and perform calculation.
Press ≤
Ï
.
7. To input START and STEP values:
0
®
.001
®
(1) Newton’s method
• This method is used to find the solution of a complex equation. For example, this
method can obtain the real value of a square root by repeating calculations.
• To find the solution using this method, it is necessary to specify the initial value
(START) and step value (STEP).
The calculation is repeated until the difference between the right side and left side of
the equation is within the allowable range.
<Example>
Use the equation “S = P (1 + I)
N
” (S: Amount with interest added, P: Initial investment
amount, I: Interest rate, N: Investment period) to calculate an interest rate necessary
to get $15,000 after 5 years from an initial investment of $10,000.
1. Press
Ï
¬¬
. Clears the previous equations.
2. Press
Ï
A
2
. Specifies the Newton analysis method.
3. To input the equation, follow these steps.
EL-9650-(09)EN (211-220) 8/1/00, 9:14 AM214
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