Defining and plotting this function

Question:Defining and plotting this function

Posted: al-faraj 15 Product: Maple 2015

September 26 2015

Hello

I have this function:

f(x)=80x-2x²

I want to plot it (and ofcourse define it)

I then need to find A'(x)= 0 which has to give 20, but my maple wont do that.

Help me thanks.

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