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Appendix A: Functions and Instructions 533
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 533 of 132
‰
()
can be nested to do multiple integrals.
Integration limits can depend on integration
variables outside them.
Note: See also
nInt()
.
‰(‰(ln(x+y),y,0,x),x,0,a)
¸
‡
()
(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
(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
(expression1, var, low, low
ì
1
)
⇒
1
Π
(k,k,4,3)
¸
1
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
(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)
¸
n
ø
(n
+
1)
ø
(2
ø
n
+
1)
6
G
(1/n^2,n,1,
ˆ
)
¸
p
ñ
6
G
(expression1, var, low, low
ì
1
)
⇒
0
G
(k,k,4,3)
¸
0
G
(expression1, var, low, high)
⇒
ë
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