Casio FX-CG10, Руководство пользователя

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4-2
Example To solve the following simultaneous linear equations for
x
,
y
, and
z
4
x
+
y
– 2
z
= – 1
x
+ 6
y
+ 3
z
= 1
– 5
x
+ 4
y
+
z
= – 7
1
m
Equation
2
1
(SIMUL)
2
(3)
3 e
w
b
w-
c
w-
b
w
b
w
g
w
d
w
b
w
-
f
w
e
w
b
w-
h
w
4
1
(SOLVE)
• Internal calculations are performed using a 15-digit mantissa, but results are displayed using
a 10-digit mantissa and a 2-digit exponent.
• Simultaneous linear equations are solved by inverting the matrix containing the coefficients
of the equations. For example, the following shows the solution (
x
,
y
,
z
) of a simultaneous
linear equation with three unknowns.
Because of this, precision is reduced as the value of the determinant approaches zero. Also,
simultaneous equations with three or more unknowns may take a very long time to solve.
• The message “No Solution” appears if there is no solution. The message “Ma ERROR”
appears if a solution could not be found.
• The message “Infinitely Many Solutions” appears along with the formula if there are an
infinite number of solutions.
• After calculation is complete, you can press
1
(REPEAT), change coefficient values, and
then re-calculate.
–1
=
x
y
z a
1
b
1
c
1
a
2
b
2
c
2
a
3
b
3
c
3
d
1
d
2
d
3
–1
=
x
y
z a
1
b
1
c
1
a
2
b
2
c
2
a
3
b
3
c
3
d
1
d
2
d
3