Casio ClassPad 330, User Manual

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Using the Action Menu
S s olve
Function: Returns the solution of an equation or inequality.
Syntax: solve(Exp/Eq/Ineq [,variable] [ ) ]
• For this syntax, “Ineq” also includes the p operator.
• “
x
” is the default when you omit “[,variable]”.
solve(Exp/Eq,variable[, value, lower limit, upper limit] [ ) ]
• This syntax does not support “Ineq”, but the p operator is supported.
• “value” is an initially estimated value.
• This command is valid only for equations and p expressions when “value”
and the items following it are included. In that case, this command returns
an approximate value.
• A true value is returned when you omit “value” and the items following it.
When, however, a true value cannot be obtained, an approximate value is
returned for equations only based on the assumption that value = 0, lower
limit = –
d , and upper limit = d .
solve({Exp-1/Eq-1, ..., Exp-N/Eq-N}, {variable-1, ..., variable-N} [ ) ]
• When “Exp” is the first argument, the equation Exp = 0 is presumed.
Example: To solve
ax
+
b
= 0 for
x
Menu Item: [Action][Equation/Inequality][solve]
Example: To solve simultaneous linear equations 3
x
+ 4
y
= 5, 2
x
– 3
y
= –8
Menu Item: [Action][Equation/Inequality][solve]
You also could input the simultaneous equations shown in this example using the 2D
keyboard key. The following shows the required input syntax.
Exp-1/Eq-1
Exp-N/Eq-N variable-1, ..., variable-N
• The following shows the required key operation to input this example using the key.
B ] C 8 D A A ] B 8 G
C ] 8 U
• To input simultaneous equations with three or more unknowns, press the key when
the cursor is in the Exp-N/Eq-N input field. Each press of will add one more line for
input of an equation.