Sharp EL-9900 - Manual (Page 57)

4
Advanced Keyboard/ALGEBRA USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
Solving an equation using Newton's method
1. Press 2ndF SOLVER to enter the solver feature. Press CL to clear the
formula entry screen.
2. Select the Newton's method for solving by pressing 2ndF SOLVER ,
A (METHOD) 2 (Newton). Enter the formula A = H(B + C) by pressing
ALPHA A ALPHA = 1 a/b 2 ALPHA H ( ALPHA B +
ALPHA C ) .
3. Press ENTER to view the variable list. To find the height of a trapezoid with
an area of 25 in 2 , and bases of length 5 and 7 inches, enter the values by
pressing 2 5 ENTER
▼ 5 ENTER 7 ENTER ▲ ▲ .
Notice the height (H) is now highlighted by the cursor.
4. Press 2ndF EXE to continue. Newton's method will prompt you for a
guess or starting point. Enter a starting point of 1 by pressing 1 ENTER .
5. Press 2ndF EXE to solve. A height of 4.1667 will appear on the screen.
6. Pressing CL will return you to the variable screen. You can now change or
solve for any of the values. Save this formula by pressing 2ndF SOLVER ,
C (SAVE) ENTER and entering the formula name. Give the formula the
name "ATRAP," by pressing A T R A P ENTER .
FORMULAS OR LITERAL EQUATIONS
1
2
▼