Casio 3950P, Руководство по программированию

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34
24 The inverse of a 2 × 2 matrix.
The inverse of the
２×２
matrix is . In other words,
As is clear from the formula above, when the denominator , no inverse exists.
Program
Ｌｂｌ １：？→ Ａ：？→ Ｂ：？→ Ｃ：？→ Ｄ：ＡＤ － ＢＣ → Ｍ：Ｍ ＝０⇒ Ｇｏｔｏ １：
Ａ→Ｘ：Ｄ÷Ｍ→Ａ：Ｘ÷Ｍ→Ｄ：－Ｂ÷Ｍ→Ｂ：－Ｃ÷Ｍ→Ｃ：Ａ Ｂ Ｃ Ｄ ＜
71 STEP
＞
INPUT A, B, C, D : matrix
OUTPUT A, B, C, D : inverse of matrix
Execution Example:
The inverse matrix of is
For , the inverse does not exist and the values and must be re-entered.
a b
c d  
 
 
1
ad bc –
------------------
d b –
c – a  
 
 
1
ad bc –
------------------
d b –
c – a
 
 
 
a b
c d
 
 
 
1 0
0 1  
 
 
=
a
d
bc – 0 =
a b
c d  
 
 
a b
c d
 
 
 
1 4
2 4  
 
 
1
–
1
0.5 0.25 –  
 
 
Prog 1
1
EXE
4
EXE
2 EXE 4 EXE
M
Disp
S A D R P1 P1 P2 P3 P4 G
EXE
M
Disp
S A D R P1 P1 P2 P3 P4 G
EXE
M
Disp
S A D R P1 P1 P2 P3 P4 G
EXE
M S A D R P1 P1 P2 P3 P4 G
ad bc 0 = – a b c , , d
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