G (), 908 appendix a: functions and instructions – Texas Instruments TITANIUM TI-89 User Manual
Page 908
908
Appendix A: Functions and Instructions
‡
‡
‡
‡()
(square root)
2 ]
key
‡
‡
‡
‡ (
expression1
)
⇒
⇒
⇒
⇒
expression
‡
‡
‡
‡ (
list1
)
⇒
⇒
⇒
⇒
list
Returns the square root of the argument.
For a list, returns the square roots of all the
elements in
list1.
‡
(4)
¸
2
‡
({9,a,4})
¸
{3
‡
a 2}
Π
()
(product)
MATH/Calculus menu
Π
Π
Π
Π
(
expression1
,
var
,
low
,
high
)
⇒
⇒
⇒
⇒
expression
Evaluates
expression1
for each value of
var
from
low
to
high
, and returns the product of the results.
Π
(1/n,n,1,5)
¸
1
120
Π
(k^2,k,1,n)
¸
(n!)
ñ
Π
({1/n,n,2},n,1,5)
¸
{
1
120 120 32
}
Π
Π
Π
Π
(
expression1
,
var
,
low
,
low
ì 1) ⇒
⇒
⇒
⇒ 1
Π
(k,k,4,3)
¸
1
Π
Π
Π
Π
(
expression1
,
var
,
low
,
high
)
⇒
⇒
⇒
⇒ 1
/
Π
(
expression1,
var, high
+1,
low
ì 1)
if
high
<
low
ì 1
Π
(1/k,k,4,1)
¸
6
Π
(1/k,k,4,1)
ù
Π
(1/k,k,2,4)
¸
1/4
G()
(sum)
MATH/Calculus menu
G
G
G
G (
expression1
,
var
,
low
,
high
)
⇒
⇒
⇒
⇒
expression
Evaluates
expression1
for each value of
var
from
low
to
high
, and returns the sum of the results.
G
(1/n,n,1,5)
¸
137
60
G
(k^2,k,1,n)
¸
nø (n + 1)ш (2ш n + 1)
6
G
(1/n^2,n,1,ˆ)
¸
pñ
6
G
G
G
G (
expression1
,
var
,
low
,
low
ì 1) ⇒
⇒
⇒
⇒ 0
G
(k,k,4,3)
¸
0
G
G
G
G (
expression1
,
var
,
low
,
high
)
⇒
⇒
⇒
⇒ ë G
G
G
G (
expression1,
var, high
+1,
low
ì 1) if
high
<
low
ì 1
G
(k,k,4,1)
¸
ë
5
G
(k,k,4,1)+G(k,k,2,4)
¸
4
#
(indirection)
CATALOG
#
varNameString
Refers to the variable whose name is
varNameString
. This lets you create and modify
variables from a program using strings.
Program segment:
©
:Request "Enter Your Name",str1
:NewFold #str1
©
©
:For i,1,5,1
: ClrGraph
: Graph iù x
: StoPic #("pic" & string(i))
:EndFor
©