SEQUENCES Sums (Page 2 of 7)

First enter the sum command (from the LIST MATH submenu), immediately followed by the seq command (from the LIST OPS submenu). Then specify the rule of the sequence, the variable name used to define the rule, the first term number and the last term number. For this example, the rule of the sequence is a(subscript k) = k^2-2k-3, the first term number is 3, and the last term number is 15.

 2nd QUIT key. CLEAR key.

 2nd LIST key. Left arrow key. 5: menu selection. 2nd LIST key. Right arrow key. 5: menu selection. ALPHA K key. x-squared key. Minus key. 2 ALPHA K key.
 Minus key. 3 Comma key. ALPHA K key. Comma key. 3 Comma key. 15 Right parenthesis key. Right parenthesis key. ENTER key.

 Calculator screen image.

The seq command generates the required terms, then the sum command finds their sum.
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