MathCAD . , , , ( ).
I. :
1. Given, .
2. , Evaluation ().
3. , .
4. Odesolve, , , , Odesolve .
5. , .
6. .
II. ( rkfixed).
1. , .
2. , Evaluation ().
3. .
4. , , rkfixed : , , , .
5. , .
6. .
I. [0,100] (0)=1, :
1. Given.
2. , :
.
3. , :
(0)=1.
4. Odesolve:
:=Odesolve(x,100).
5. :
x:=0,..100.
6. .
II. rkfixed:
1.
(0)=y0:=0.1.
2. , .
3. :=100.
4. rkfixed. ().
=rkfixed(0, 1,2,, D).
5. :
:=0,..100.
6. .
: .
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, MathCAD :
- Rkadapt - ( , );
- Bulstoer - ( , ).
(y0, a, b, n, D):
- y 0 , ( );
- a , ( y 0);
- b ;
- n , ;
- D (x, y) , ( , )