Casio CFX-9850G PLUS Calculations Manual
7. equation calculations
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Also See for CFX-9850G PLUS:
- User manual (85 pages) ,
- Calculations manual (72 pages) ,
- Programming manual (48 pages)
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Equation Calculations
Your graphic calculator can perform the following three types of
calculations:
• Linear equations with two to six unknowns
• High-order equations (quadratic, cubic)
• Solve calculations
7-1
Before Beginning an Equation Calculation
7-2
Linear Equations with Two to Six Unknowns
7-3
Quadratic and Cubic Equations
7-4
Solve Calculations
7-5
What to Do When an Error Occurs
Chapter
7
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Table of Contents
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Summary of Contents for Casio CFX-9850G PLUS
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Page 1: Equation Calculations
Chapter Equation Calculations Your graphic calculator can perform the following three types of calculations: • Linear equations with two to six unknowns • High-order equations (quadratic, cubic) • Solve calculations Before Beginning an Equation Calculation Linear Equations with Two to Six Unknowns Quadratic and Cubic Equations Solve Calculations What to Do When an Error Occurs... -
Page 2: Before Beginning An Equation Calculation
7-1 Before Beginning an Equation Calculation Before beginning an equation calculation you have to first enter the correct mode, and you must also clear the equation memories of any data that might be left over from a previous calculation. k k k k k Entering an Equation Calculation Mode In the Main Menu, select the EQUA icon to enter the Equation Mode. -
Page 3: Linear Equations With Two To Six Unknowns
7-2 Linear Equations with Two to Six Unknowns You can use the procedures described here to solve linear equations with unknowns that match the following formats: x + b y = c Two unknowns x + b y = c x + b y + c z + d... - Page 4 7 - 2 Linear Equations with Two to Six Unknowns k k k k k Solving Linear Equations with Three Unknowns Example To solve the following linear equations for , and – 2 = –1 –5 = –7 1. While in the Linear Equation Mode (SIML), press 2 (3), because the linear equations being solved have three unknowns.
- Page 5 7 - 2 Linear Equations with Two to Six Unknowns • Internal calculations are performed using a 15-digit mantissa, but results are displayed using a 10-digit mantissa and 2-digit exponent. • This unit performs simultaneous linear equations by placing the coefficients inside of a matrix.
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Page 6: Quadratic And Cubic Equations
7-3 Quadratic and Cubic Equations This calculator can also solve quadratic and cubic equations that match the following formats (when G G G G G • Quadratic: • Cubic: k k k k k Specifying the Degree of an Equation While in the Equation Mode, press 2 (POLY) and then specify the degree of the equation. - Page 7 7 - 3 Quadratic and Cubic Equations • Internal calculations are performed using a 15-digit mantissa, but results are displayed using a 10-digit mantissa and 2-digit exponent. • An error occurs whenever the unit is unable to solve the equations. •...
- Page 8 7 - 3 Quadratic and Cubic Equations k k k k k Changing Coefficients You can change a coefficient either before or after you register it by pressing w. u u u u u To change a coefficient before registering it with w Press the A key to clear the current value and then input another one.
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Page 9: Solve Calculations
7-4 Solve Calculations You can determine the value of any variable you are using without having to solve the equation. Input the equation, and a table of variables appears on the display. Use the table to assign values to variables and then execute the calculation to obtain a solution and display the value of the unknown variable. - Page 10 7 - 4 Solve Calculations 3. Input the values. bew(H=14) aw(V=0) cw(T=2) j.iw (G=9.8) 4. Press f to move the highlighting to V = 0. 5. Press 6 (SOLV) to obtain the solution. Equation Solution • An error occurs if you input more than one equals sign. •...
- Page 11 7 - 4 Solve Calculations • Solve uses Newton’s method to calculate approximations. The following can sometimes occur when this method is used. —Solutions may be impossible to obtain for certain initial estimated values. Should this happen, try inputting another value that you assume to be in the vicinity of the solution and perform the calculation again.
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Page 12: What To Do When An Error Occurs
7-5 What to Do When an Error Occurs u u u u u Error during coefficient value input Press the A key to clear the error and return to the value that was registered for the coefficient before you input the value that generated the error. Try inputting a new value again.