121616949-math.292

# 121616949-math.292 - subsequent commands that depend on the...

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278 Appendix A Introduction to Maple 2x; 2*x; You must always type the multiplication symbol—Maple will not accept the first line even though it is standard notation. If you make a simple typing mistake like this, you can fix it without retyping the command. In this case, Maple should correctly guess where the problem is and place the cursor between the 2 and the x ; simply type the * and press return. In any case, you can always move the mouse pointer to the po- sition of the mistake and click the left but- ton, then make your corrections. You can adjust your position in the line using the ar- row keys to the right of the main keyboard. When you press the return key, the com- mand will be re-evaluated. expand(f); factor(%); factor(x^2+4*x+5); If a polynomial doesn’t factor, Maple leaves it alone. (As a general rule, if Maple cannot perform a calculation it will simply restate the command.) WARNING: You can go back anywhere in your Maple session and change a command. When you do this you change only the result of that command—you do not change any
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Unformatted text preview: subsequent commands that depend on the result. If you want to re-execute subsequent commands, you must move the cursor to each command in turn and press the return key. Do not overuse this editing ability—it can make the chain of events very diﬃcult to follow. It often is better to copy the command, paste it in at the end of the session, modify it there, and execute it as a new command. To copy and paste a command, do this: Position the mouse pointer at the beginning of the command you want to copy, press the left mouse button and hold it down, move the mouse cursor to the end of the command, and release the mouse button. (If the command is on a single line, you may also select the whole command by positioning the cursor in the line, and clicking the left mouse button three times quickly—this is a “triple click”.) The command should now be highlighted. Position the mouse pointer where you want to paste and click the middle button....
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