HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 550)

The following screen shots show the RPN stack before and after application of

function RRK:

The value stored in variable y is 3.00000000004.

Function RKFSTEP

This function uses an input list similar to that of function RKF, as well as the

tolerance for the solution, and a possible step ∆x, and returns the same input

list, followed by the tolerance, and an estimate of the next step in the

independent variable. The function returns the input list, the tolerance, and

the next step in the independent variable that satisfies that tolerance. Thus,

the input stack looks as follows:

3: {‘x’, ‘y’, ‘f(x,y)’}

After running this function, the stack will show the lines:

3: {‘x’, ‘y’, ‘f(x,y)’}

Thus, this function is used to determine the appropriate size of a time step to

satisfy the required tolerance.

The following screen shots show the RPN stack before and after application of

function RKFSTEP:

These results indicate that (∆x)

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HP 48gII Graphing Calculator Manual do Utilizador Página 550