Hit the Math button (Right under ALPHA) and it should already be on the MATH tab. go down to summation ∑( and you're set!
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graphing calculators only. TI-83 and TI-84 calculators.
613956 is the answer for Box 4
The equal sign is the same as the enter button
The TI-84 Plus Graphing Calculator may be the last calculator you ever need to buy. It can assist you with the simpler mathematics functions such as additionand subtraction and can easily help a student in an algebra class. With its large screen and easy tonavigate buttons. The x, y, and z variable buttons along with the pre-loaded apps titled "Topics in Algebra 1 Chapter 5 and Topics in Algebra 1 Chapters 1-4, this calculator has just what a budding algebra student needs.