I am having trouble with getting started with this one:(adsbygoogle = window.adsbygoogle || []).push({});

Find the maximum and minimum values of f(x,y)=x+2y on the disk x^2+y^2 ≤ 1

I have started like this:

fx(x,y) = 1

fy(x,y) = 2

and then Im lost...How do I solve it?

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# Finding the maximum and minimum values

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