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14
Advanced Keyboard/PROGRAMMING USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
4. Press Y= and CL to clear the Y1 prompt. Press and CL to clear
additional prompts. Press to return to the Y1 prompt. Enter the
function for which you want to find the roots. Enter x
2
– 2 by pressing
X/θ/T/n x
2
– 2 ENTER . Execute the NEWTONS program by
pressing PRGM A (EXEC) and select NEWTONS. The program will
prompt you for the accuracy you desire in calculating the root. Enter .001
by pressing . 0 0 1 ENTER . Next, the program will prompt you
for your guess. Enter 1 by pressing 1 ENTER . A blinking cursor in the
upper right-hand corner tells you the program is still working. Continue to
press ENTER until the blinking cursor is gone. The last value on the
screen is your approximate for the root.
You can repeat this program for other roots by pressing ENTER to execute
the program again with another guess. You can repeat the program for other
functions by pressing Y= and changing the Y1 function to the new one. If
you receive an error statement, press or to go to the line within the
program with the error. Correct the error and execute the program again.
NEWTON’S METHOD (continued)
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