Simultaneous Linear Equations; Chapter 4 Equation Calculations - Casio FX-CG20 AU User Manual
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- User manual (52 pages) ,
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Chapter 4
From the Main Menu, enter the Equation mode.
• { SIMUL } ... {linear equation with 2 to 6 unknowns}
• { POLY } ... {degree 2 to 6 equation}
• { SOLVER } ... {Solve calculation}
1. Simultaneous Linear Equations
You can solve simultaneous linear equations with two to six unknowns.
• Simultaneous Linear Equation with Two Unknowns:
a
x
b
y
+
=
1
1
a
x
b
y
+
=
2
2
• Simultaneous Linear Equation with Three Unknowns:
a
x
b
y
+
+
1
1
a
x
b
y
+
+
2
2
a
x
b
y
+
+
3
3
1. From the Main Menu, enter the Equation mode.
2. Select the SIMUL (Simultaneous) mode, and specify the number of unknowns (variables).
You can specify from 2 to 6 unknowns.
3. Sequentially input the coefficients.
• The cell that is currently selected for input is highlighted. Each time you input a coefficient,
the highlighting shifts in the sequence:
→
→
a
b
c
1
1
• You can also input fractions and values assigned to variables as coefficients.
• You can cancel the value you are inputting for the current coefficient by pressing J at
any time before you press w to store the coefficient value. This returns to the coefficient
to what it was before you input anything. You can then input another value if you want.
• To change the value of a coefficient that you already stored by pressing w, move the
cursor to the coefficient you want to edit. Next, input the value you want to change to.
• Pressing 3(CLEAR) clears all coefficients to zero.
4. Solve the equations.
Equation Calculations
c
1
c
2
c
z
d
=
1
1
c
z
d
=
2
2
c
z
d
=
3
3
→ ...
→
→
a
b
c
(
n
n
n
1
n
= 2 to 6)
4-1
4
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