Casio fx-CP400 User Manual page 54

Solutions Supported by ClassPad (TRUE, FALSE, Undefined, No Solution,
Solution Description
TRUE Output when a solution is true.
FALSE Output when a solution is false.
Undefined Output when a solution is undefined.
No Solution Output when there is no solution.
∞
Infinity
const Constant displayed as const(1) when any value that is a
constant is included in the solution. In the case of multiple
constants, they are indicated as const(1), const(2), and
so on.
constn Constant displayed as constn(1) when the solution
includes any integer value that is a constant. In the case
of multiple constants, they are indicated as constn(1),
constn(2), and so on.
Dirac Delta Function
"delta" is the Dirac Delta function. The delta function evaluates numerically as shown below.
 
^
b
b 

Non-numeric expressions passed to the delta function are left unevaluated. The integral of a linear delta
function is a Heaviside function.
Syntax: delta( )
: variable or number
0210 (Calculation example screenshot)
n
th-Delta Function
The th-delta function is the th differential of the delta function.
Syntax: delta( , )
: variable or number
: number of differentials
0211 (Calculation example screenshot)
Heaviside Unit Step Function
"heaviside" is the command for the Heaviside function, which evaluates only to numeric expressions as shown
below.
 

H  

!
 
Any non-numeric expression passed to the Heaviside function will not be evaluated, and any numeric
expression containing complex numbers will return undefined. The derivative of the Heaviside function is the
Delta function.
Syntax: heaviside( )
: variable or number
0212 (Calculation example screenshot)
∞
, const, constn)
Example
judge (1 = 1) w
judge (1 < 0) w
1/0 w
solve (abs ( ) = –1, ) w
, , 0) w
lim (1/ 2
= , , ) w
dSolve (
{ = 0.5· 2 + const (1)}
Change the [Angle] setting to
"Degree".
solve (sin ( ) = 0, ) w
{ = 180·constn (1)}
Chapter 2: Main Application 54