Casio Differential Equation Software Manual

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Contents

1-1Using the DIFF EQ Mode1. Using the DIFF EQ ModeYou can solve differential equations numerically and graph the solutions. The generalprocedure for solving a differential equation is described below.Set Up1. From the Main Menu, enter the DIFF EQ Mode.Execution2. Select the differential equation type.• 1(1st) ........ Four types of first order differential equations• 2(2nd) ...... Second order linear differential equations• 3(N-th) ...... Differential equations of the first order through ninth order• 4(SYS) ..... System of the first order differential equations• 5(RCL) ..... Displays a screen for recalling a previous differential equation.• With 1(1st), you need to make further selections of differential equation type. See“Differential equations of the first order” for more information.• With 3(N-th), you also need to specify the order of the differential equation, from 1to 9.• With 4(SYS), you also need to specify the number of unknowns, from 1 to 9.3. Enter the differential equation.4. Specify the initial values.5. Press 5(SET) and select b(Param) to display the Parameter screen. Specify thecalculation range. Make the parameter settings you want.• h ................... Step size for the classical Runge-Kutta method (fourth order)• Step ............. Number of steps for graphing*1 and storing data in LIST.• SF ................ The number of slope field columns displayed on the screen (0 – 100).The slope fields can be displayed only for differential equations of thefirst order.* 1 When graphed for the first time, a function isalways graphed with every step. When thefunction is graphed again, however, it isgraphed according to a value of Step. Forexample, when Step is set to 2, the function isgraphed with every two steps.