MathCAD.page17

MathCAD.page17 - if Mathcad can give us more surprises To...

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2. BASIC USAGE OF Mathcad 17 Type Display Remark x^2+3x x 2+3 x No space is typed after ^ so Mathcad continue entering the expression as exponents. x^2 +3x x 2 + 3 x A space is typed after ^ so Mathcad exists the power mode and enter 3 x as another term. x[2+3x x 2+3 x No space is typed after [ , the subindex operator so Mathcad continue entering the expres- sion as subindex. x[2 +3x x 2 + 3 x A space is typed after [ so Mathcad exists the power mode and enter 3 x as another term. x+3/4x+5 x + 3 4 x +5 No space is typed before / so Mathcad interprets as 3 di- vided by 4 x + 5. x+3 /4x+5 x +3 4 x +5 A space is typed before / so Mathcad groups x + 3 and treats it as numerator. Table 6. Mathcad Effect of Space Character of the denominator, we need to press space too. For example, if we want enter x +3 4 x +5 + 7 x , we would type in Mathcad as x+3 /4x+5 +7x that is entering one space after 3 and another space after 5 to move out the denominator. Play with the space character (space bar) to see
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Unformatted text preview: if Mathcad can give us more surprises! To find value of a function, such as f (3), or h (4 , 2), you first define the function f and g and type f(3)= or h(4,2)= , Mathcad will happily find the value for you. To graph a function of one variable after defining it, just click any blank space after the definition of the function and type @ or from Insert menu choose to insert xy-plot . A box will appear with several place holders. Enter the function name on the left center place holder and the variable on the bottom center place holder. If the variable name is not used before, the Mathcad will display a graph over default interval [-10, 10]. But if we has assign values for the variable, depending on how we assign value to variable, we might be surprised to find no curve...
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