Casio FX-CG10 Manual de usuario Pagina 129

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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 ewbw-cw-bw
bwgwdwbw
-fwewbw-hw
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 “Infinitely Many
Solutions” appears if there are an infinite number of solutions. The message “Ma ERROR”
appears if a solution could not be found.
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
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