User manual CASIO FX-500

[. . . ] Do not skip it! P P button k Resetting the Calculator to Initial Defaults Perform the operation below to return the calculator to its initial default settings. Note that resetting the calculator will also delete all data currently stored in its memory. To reset the calculator to initial defaults 1. · This causes the "Reset All?" confirmation message to appear. · If you do not want to reset the calculator to initial defaults, press J(No) instead of E(Yes). [. . . ] Enter the RECUR Mode: Select the an+1 type: Input the recursion formula: z2(an)+z1(n)+1 Register the recursion formula: E (This displays the table range screen. ) N6(RECUR) z ­ {TYPE}2(an+1) Input a1 = 2, Start = 1, End = 10: 2E1E10E Create the sequence table: E (This displays the sequence table screen. ) A Creating an an Type Sequence Table 12 Example: To create a sequence table with the general term an = ( )n + 2n ­ 3 using a 2 range of 2 < n < 6 (n = integer). B Enter the RECUR Mode: Select the an type: N6(RECUR) z ­ {TYPE}1(an) Input the general term: '1c2ez1(n)x+ 2z1(n)-3 E-68 Register the general term: E (This displays the table range screen. ) Input Start = 2 and End = 6: 2E6E Create the sequence table: E (This displays the sequence table screen. ) k Sequence Calculation Precautions The following functions cannot be used during sequence calculations. · CALC · SOLVE · Coordinate conversion (Pol(, Rec() 2 2 · d/dx(, d /dx (, (, ( · Independent memory add and subtract (l, 1l(M­)) · Assignment of values to variables (1~(STO)) · Multi-statement input Sequence Table Generation Errors · A sequence table can have up to 199 lines. A Range ERROR occurs if a table range setting causes this to be exceeded. · A "Memory Full" error also occurs if the calculator runs out of calculation result memory while performing a sequence table calculation. Math ERROR during Sequence Calculation If a Math ERROR occurs during sequence table calculation, the sequence table screen appears on the display with "ERROR" in the cell that generated the error. Equation Calculations (EQN) k Equation Calculation Overview This section shows the general operational procedure for solving simultaneous linear equations with two unknowns. Natural display is used for this procedure. · This displays an initial EQN type menu like the one shown below. 2. Press 1(aX+bY=c) to select simultaneous linear equations with two unknowns. · This displays a coefficient editor screen like the one shown below. You can use this screen to input values for the equation's coefficients. 3. 1E0. 5E3E2E3E4E X + 0. 5Y = 3 2X + 3Y = 4 These values will produce the simultaneous equations shown above. 4. · This displays the solution for X. · Use c and f to switch the display between the solutions for X and Y. · To exit the solution screen and return to the coefficient editor screen, press J. E-70 k Selecting an Equation Type The following shows the operations you can use to select an equation type. Whenever you start input of a sample data set by inputting a value for any one of its columns on the STAT editor screen, the remaining column(s) in the same sample data set change(s) to their initial defaults (X = 0, Y = 0, FREQ = 1). · Inputting a calculation expression into a cell and pressing E will register the result of the calculation. · In both the SD Mode and REG Mode, you can input up to 199 STAT editor lines of sample data. · Sample data you input is retained in memory until you delete it or reset the calculator. Changing to another calculation mode, changing the statistical frequency setting, or turning off the calculator does not affect sample data. E-73 · Even though Y-data is not used and there is no indication of Y-data on the screen in the SD Mode, the calculator still maintains a Y-value (always zero) internally for each X-data. Because of this, if you perform a statistical calculation operation that involves Y-data (such as y) after inputting single-variable data in the SD Mode, the calculator will produce a result without displaying an error. A Editing Sample Data You can use the procedures in this section to perform the following STAT editor screen editing operations: replace cell contents, insert a line, insert a cell, delete a cell, and delete all STAT editor screen data. Replacing the Contents of a Cell Use the cursor keys to move the cursor to the cell whose contents you want to replace and then input the value or calculation expression you want. After you are finished, press E to register your input. Inserting a Line 1. Move the cursor to the location where you want to insert the line. · This shifts the line where the cursor is located and everything below it downwards, and inserts a new line. · All of the columns in the newly inserted lines are filled in with the applicable initial default values (X = 0, Y = 0 if applicable, FREQ = 1). Deleting all STAT Editor Data 1. · This causes the "Delete All Data?" confirmation message to appear. [. . . ] 1 Check the calculation expression to make sure it does not include any errors. 2 Make sure that you are using the correct mode for the type of calculation you are trying to perform. (1) Press Nc3(SYSTEM) to enter the SYSTEM Mode. (3) On the confirmation screen that appears, press E(Yes). [. . . ]