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, lowì1) ⇒ 1Π(k,k,4,3) ¸1
Π(expression1, var, low, high) ⇒ 1/Π(expression1,
var, high+1, lowì1) if high < lowì1Π(1/k,k,4,1) ¸6
Π(1/k,k,4,1)ùΠ(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) ¸
nø(n + 1)ø(2øn + 1)
6
G(1/n^2,n,1,ˆ) ¸
pñ
6
G(expression1, var, low, lowì1) ⇒ 0G(k,k,4,3) ¸0
G(expression1, var, low, high) ⇒ ëG(expression1,
var, high+1, lowì1) if high < lowì1
G(k,k,4,1) ¸ë5
G(k,k,4,1)+G(k,k,2,4) ¸4