Texas Instruments TI-30XIIB Owners Manual - Page 28

Texas Instruments TI-30XIIB Manual

Get Texas Instruments TI-30XIIB PDF manuals and user guides View all Texas Instruments TI-30XIIB manuals
Add to My Manuals
Save this manual to your list of manuals

Page 28 highlights

Your calculator also provides two universal roots and powers keys that allow you to vary the value of the exponent as well as the value of the base. One is accessed by the riln key. The other is accessed by the LA] FY.9 key sequence providing y. These functions are the only special functions that do not act on the displayed value immediately. They require a second value before the function can be realized. Use of these DE two keys is identical Enter y. press or Irwin enter x. and press or an arithmetic function key to yield the answer A closed parenthesis also completes these functions as well as other stored operations back to the nearest open parenthesis. Example: 286- " - .64317072 Enter Press 2 86 .42 r3".1 Example: ""\'1460 = 10.332744 Display 2.86 -0.42 .64317072 Enter 1460 3.12 Press Lz±J Display 1460. 10.332744 There is a restriction on these functions -the variable y must be non-negative. When y is negative' Error" lights up in the display after x and an operation key are pressed. y cannot be negative because logarithms are used to perform these functions. T he 0th root of a number is not a natural mathematical operation and consequently results in an error condition. Any nonnegative number taken to the zero power is 1. Accuracy for these roots and powers is within -±-1 in the 8th significant digit over all ranges except for values of y very near 1 and very large exponents or very small roots. For example 1 00008' has an error of 4 in the 6th digit. These errors increase as y approaches 1and the exponent becomes extremely large or when roots become extremely small. 26

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
Your
calculator
also
provides
two
universal
roots
and
powers
keys
that
allow
you
to
vary
the
value
of
the
exponent
as
well
as
the
value
of
the
base.
One
is
accessed
by
the
riln
key.
The
other
is
accessed
by
the
LA]
FY
.
9
key
sequence
providing
y.
These
functions
are
the
only
special
functions
that
do
not
act
on
the
displayed
value
immediately.
They
require
a
second
value
before
the
function
can
be
realized.
Use
of
these
two
keys
is
identical
Enter
y.
press
DE
or
Irwin
enter
x.
and
press
or
an
arithmetic
function
key
to
yield
the
answer
A
closed
parenthesis
also
completes
these
functions
as
well
as
other
stored
operations
back
to
the
nearest
open
parenthesis.
Example:
286
-"
—
.64317072
Enter
Press
Display
2
86
r3"
.
1
2.86
.42
-0.42
.64317072
Example:
""\'1460
=
10.332744
Enter
1460
3.12
Press
Lz±J
Display
1460.
10.332744
There
is
a
restriction
on
these
functions
—the
variable
y
must
be
non
-negative.
When
y
is
negative'
Error"
lights
up
in
the
display
after
x
and
an
operation
key
are
pressed.
y
cannot
be
negative
because
logarithms
are
used
to
perform
these
functions.
T
he
0th
root
of
a
number
is
not
a
natural
mathematical
operation
and
consequently
results
in
an
error
condition.
Any
non
-
negative
number taken
to
the
zero
power
is
1.
Accuracy
for
these
roots
and
powers
is
within
-±-1
in
the
8th
significant
digit
over
all
ranges
except
for
values
of
y
very
near
1
and
very
large
exponents
or
very
small
roots.
For
example
1
00008'
has
an
error
of
4
in
the
6th
digit.
These
errors
increase
as
y
approaches
1
and
the
exponent
becomes
extremely
large
or
when
roots
become
extremely
small.
26