HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 332
operation is, stored differently. This is purely a personal preference generally.
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After typing the 5, press up arrow once to highlight that node S. If you now press left arrow you will find that the highlight will jump horizontally to node A, highlighting the entire numerator. Pressing R down arrow four times moves down through the tree from A to P to B to D to F. To access and change the power of 2, press up arrow twice to move up to node B, then press right arrow to move from node B to node Q. If you now press + and 3 you will find that this is added to the power, with brackets applied as required. Try redrawing the tree as it would now appear. Node Q will then become an addition with two new nodes below. A + 5 S P C ^ 81 Finally, exit the CAS by pressing HOME. B * 2Q D Note: There can be a problem with the way that the X2 ^ button is handled. If you try going back through the E X same exercise but pressing the X2 button at step 3 you will find that this makes it impossible to access F 2 G 3 and edit the power because the X2 operation is stored differently. This is purely a personal preference generally. x2 + 4x + 3 Another example of a tree for is given below to illustrate the result of having three terms in part x−2 of the expression. It can be seen that despite having three terms the result is still a binary tree. The squares show the terms which will be highlighted in turn if the x2 term is highlighted and then the right arrow is pressed. + + ^ * X 2 4 X _ 3 X 2 332