Casio FX-CG10 Software User Guide - Page 179
WEB Graph Convergence, Divergence, Con V-Window settings.
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• When "On" is selected "ΣDisplay" on the Setup screen and all three of the expressions you input in the Recursion mode are selected for table creation, use the function menu that appears when you press 3(PHASE) on the table screen to specify which two of the expressions you want to use, and to specify whether you want to use numeric sequence data or numeric sequence sum data. 1(a •b).......... Graph using number sequences an (an+1, an+2) and bn (bn+1, bn+2) 2(b •c).......... Graph using number sequences bn (bn+1, bn+2) and cn (cn+1, cn+2) 3(a •c).......... Graph using number sequences an (an+1, an+2) and cn (cn+1, cn+2) 4(Σ a •b) ....... Graph using the sums of number sequences an (an+1, an+2) and bn (bn+1, bn+2) 5(Σ b •c) ....... Graph using the sums of number sequences bn (bn+1, bn+2) and cn (cn+1, cn+2) 6(Σ a •c) ....... Graph using the sums of number sequences an (an+1, an+2) and cn (cn+1, cn+2) k WEB Graph (Convergence, Divergence) y = f(x) is graphed by presuming an+1 = y, an = x for linear two-term recursion an+1 = f(an) composed of an+1, an. Next, it can be determined whether the function is convergent or divergent. 1. From the Main Menu, enter the Recursion mode. 2. Configure V-Window settings. 3. Select 2-term recursion as the recursion formula type, and input the formula. 4. Specify the table range, n start and end points, initial term value, and pointer start point. 5. Display the recursion formula number table. 6. Draw the graph. 7. Press w, and the pointer appears at the start point you specified. Press w several times. If convergence exists, lines that resemble a spider web are drawn on the display. Failure of the web lines to appear indicates either divergence or that the graph is outside the boundaries of the display screen. When this happens, change to larger V-Window values and try again. You can use fc to select the graph. 5-47