226
Symbols
∠
(angle)
/k
keys
'
(prime)
º
key
variable
'
variable
' '
Enters a prime symbol in a differential
equation. A single prime symbol denotes a
1st-order differential equation, two prime
symbols denote a 2nd-order, and so on.
_ (underscore as an empty element)
See “Empty (Void) Elements,”
_ (underscore as unit designator)
/_
keys
Expr
_
Unit
Designates the units for an
Expr
. All unit
names must begin with an underscore.
You can use pre-defined units or create your
own units. For a list of pre-defined units,
open the Catalog and display the Unit
Conversions tab. You can select unit names
from the Catalog or type the unit names
directly.
Note:
You can find the conversion symbol,
►
, in the Catalog. Click
, and then click
Math Operators
.
Variable
_
When
Variable
has no value, it is treated
as though it represents a complex number.
By default, without the _ , the variable is
treated as real.
If
Variable
has a value, the _ is ignored and
Variable
retains its original data type.
Note:
You can store a complex number to a
variable without
using _ . However, for best results in
calculations such as
cSolve()
and
cZeros()
,
the _ is recommended.
Assuming z is undefined:
Содержание TI-Nspire CAS
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