SEQUENCES Sums (Page 6 of 7)

First define the sequence as u in the sequence editor. Be sure nMin = 1, then define the rule for the sequence on the next line. Enter a(subscript n-1) as u(n-1), which refers to the previous term in the sequence. For a recursively defined sequence you must also specify u(nMin), which represents the first term a(subscript 1). For this example the first term is 2, so set u(nMin)=2.

 Y= key. (Clear the previous function)

 0.6 2nd u key. Left parenthesis key. X,T,theta,n key. Minus key. 1 Right parenthesis key. ENTER key.
 2

 Calculator screen image.
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