I encountered a problem "The value must be a real number" when I try to plot a graf

[KL_13413435]

I encountered a problem "The value must be a real number" when I try to plot a graph. Please help me figure out the problem. I use Mathcad Express Prime and I have attached the file.

[MartinHanak · Accepted solution]

Hi,

you must not use [] square brackets. Please fix your definition.

Add range before the plot.

[KL_13413435]

Thank you so much! May you and your family be blessed with good health and happiness.