Why am I getting a constant error when trying to graph f(x)=X^3-9X in Math CAD?

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SUMMARY

The discussion centers on resolving a graphing error in MathCAD when attempting to plot the function f(x) = X^3 - 9X. The user initially encountered an error due to incorrect syntax, specifically using "9x" instead of the proper multiplication format. The correct expression for the function is x*9, which successfully eliminates the error and allows for proper graphing of the function.

PREREQUISITES
  • Basic understanding of function notation in mathematics
  • Familiarity with MathCAD software
  • Knowledge of syntax for multiplication in programming languages
  • Experience with graphing functions
NEXT STEPS
  • Research proper syntax for mathematical expressions in MathCAD
  • Explore advanced graphing techniques in MathCAD
  • Learn about function transformations and their graphical representations
  • Investigate common errors in MathCAD and their solutions
USEFUL FOR

This discussion is beneficial for students, educators, and engineers using MathCAD for mathematical modeling and graphing, particularly those troubleshooting syntax errors in their functions.

johnfin
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I am trying to graph f(x)=X^3-9X in math cad and I keep getting a constant error on the 9x variable. How can I fix this?
 
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I don't have mathcad, but based on what you've typed here, I'm guessing it should be 9*x.
 
Ok, I figured it out by playing around with the coeffiecient. It's x*9. 9*x did not work.
 

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