HP 40g hp 39g+ (39g & 40g)_mastering the hp 39g+_English_E_F2224-90010.pdf - Page 109
NumStep, Automatic, Build Your, Stairstep, Cobweb, view rather than
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The NUM SETUP view offers more useful features. Change to that view now and change the NumStep value to 10. If you then swap back to the NUM view you will see (as right) that the sequence jumps in steps of 10. In case you don't realize... 2.1475E9 is 'computer speak' for 2 ⋅1475 ×109 . Now go back to the NUM SETUP view and change the Automatic setting to Build Your Own by moving the highlight to it and pressing the + key or by using . Switch back to the NUM view and enter the values 1, 10, 50 and 100 into the N column. You will find that the values for those terms of each sequence will appear in the U1 and U2 columns almost immediately. In case you didn't realize, the reason for the larger text is that I have used the button. Due to the type of problems one is usually trying to solve with sequences, the NUM view rather than the PLOT view is often more useful in this aplet, but let's have a look at the PLOT view anyway. Two types of plots are available, the default being Stairstep. Change to the PLOT SETUP view and ensure that the setup view is the same as that shown in the two screens above right. Then change to the PLOT view and you should see a graph similar to the one shown below right. The second type of graph is the Cobweb. 109