Sum(, prod, Sums and products of numeric sequences – Texas Instruments TI-84 User Manual

Page 274

Chapter 11: Lists

271

sum(, prod(

sum(

(summation) returns the sum of the elements in

list

start

and

end

are optional; they

specify a range of elements.

list

elements can be real or complex numbers.

prod(

returns the product of all elements of

list

start

and

end

elements are optional; they

specify a range of list elements.

list

elements can be real or complex numbers.

Sums and Products of Numeric Sequences

You can combine

sum(

prod(

with

seq(

to obtain:

To evaluate

G 2

(N–1)

from N=1 to 4:

sum(list[,start,end])

prod(list[,start,end])

upper

expression(x)

x=lower

upper

∏

expression(x)

x=lower