Texas Instruments TI-84 PLUS SILV Guidebook - Page 113

• If each term in the sequence is defined in relation to the term that precedes the previous term, as in u(nN2), you must specify initial values for the first two terms. Enter the initial values as a list enclosed in brackets { } with commas separating the values. The value of the first term is 0 and the value of the second term is 1 for the sequence u(n). Setting Window Variables To display the window variables, press p. These variables define the viewing window. The values below are defaults for Seq graphing in both Radian and Degree angle modes. nMin=1 nMax=10 PlotStart=1 PlotStep=1 Xmin=L10 Xmax=10 Xscl=1 Ymin=L10 Ymax=10 Yscl=1 Smallest n value to evaluate Largest n value to evaluate First term number to be plotted Incremental n value (for graphing only) Smallest X value to be displayed Largest X value to be displayed Spacing between the X tick marks Smallest Y value to be displayed Largest Y value to be displayed Spacing between the Y tick marks nMin must be an integer | 0. nMax, PlotStart, and PlotStep must be integers | 1. nMin is the smallest n value to evaluate. nMin also is displayed in the sequence Y= editor. nMax is the largest n value to evaluate. Sequences are evaluated at u(nMin), u(nMin+1), u(nMin+2), ... , u(nMax). PlotStart is the first term to be plotted. PlotStart=1 begins plotting on the first term in the sequence. If you want plotting to begin with the fifth term in a sequence, for example, set PlotStart=5. The first four terms are evaluated but are not plotted on the graph. PlotStep is the incremental n value for graphing only. PlotStep does not affect sequence evaluation; it only designates which points are plotted on the graph. If you specify PlotStep=2, the sequence is evaluated at each consecutive integer, but it is plotted on the graph only at every other integer. Chapter 6: Sequence Graphing 106