Texas Instruments TI-89 Titanium User Manual page 860

Sum (Sigma)
See G(), page 881.
sum()
MATH/List menu
list , start , end
sum( [ [
Returns the sum of the elements in
and
Start end
elements.
matrix1 , start
sum( [
Returns a row vector containing the sums of the
elements in the columns in
and
Start end
rows.
switch()
CATALOG
]) ⇒
integer1
switch([
Returns the number of the active window. Also can
set the active window.
Note:
Window 1
bottom.
If = 0, returns the active window number.
integer1
If
integer1
previously active window number.
If
integer1
previously active window number.
If
integer1
the previously active window number.
is ignored if the
integer1
TI-89 Titanium/Voyage™ 200 is not displaying a
split screen.
Appendix A: Functions and Instructions
]]) ⇒
expression
list
are optional. They specify a range of
]]) ⇒
, end matrix
[
.
matrix1
are optional. They specify a range of
integer
is left or top;
Window 2
= 1, activates window 1 and returns the
= 2, activates window 2 and returns the
is omitted, switches windows and returns
sum({1,2,3,4,5}) ¸
.
sum({a,2a,3a}) ¸
sum(seq(n,n,1,10)) ¸
sum({1,3,5,7,9},3) ¸
sum([1,2,3;4,5,6]) ¸[5
sum([1,2,3;4,5,6;7,8,9]) ¸
sum([1,2,3;4,5,6;7,8,9],2,3)
¸
is right or
switch()
[12 15 18]
[11,13,15]
¸
15
6ø a
55
21
7 9]
857