TI-92 -- Summation Notation
The TI-92 screen below illustrates TI-92 summation notation.
This notation has the same elements as the mathematical summation notation.
- A formula describing each term. In this case the j-th
term is j^2.
- An index variable: In this case the index variable is j.
This variable is used to number or label each term.
- A number indicating the start of the sum -- that is, the number
of the first term. In this case the start is 1. The start is usually
either zero or one but it can be anything. For example, we often start
a summation with the current year.
- A number indicating the end of the sum -- that is, the number
of the last term. In this case the end is 100.
The upper case Greek letter sigma which is the Greek equivalent of the
English letter ess is used to denote summation.
Summation is found in the TI-92 calc menu as shown in the screen
below.
Copyright c 1995 by
Frank Wattenberg, Department of Mathematics, Carroll College,
Helena, MT 59625