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Function defined with condition in CAS
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If i have a function f(x):=a*x^3a*x in CAS, can I make it treat a as greater than zero only?
In my case I want to check wether the derivative on any x value is positive or not.
For example, f'(2) gives 11a. Since I only want a>0, I can tell that this would be positive. Is there any way I could make CAS recognize that?
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