Texas Instruments TI-80 - Page 126

8-10 Lists
SUM
(summation,
LIST MATH
, item 5) returns the sum of the
elements in the specified list.
SUM
list
PROD
(product,
LIST MATH
, item 6) returns the product of
the elements of the list.
PROD
list
You can combine
SUM
or
PROD
with
SEQ(
to obtain:
upper upper
G
expression
(
x
)
∏
expression
(
x
)
x=lower x=lower
To evaluate
G
2
(N–1)
from N=1 to 4:
SUM
PROD
Sums and
Products of
Numeric
Sequences