absolute extreme of two variables

[galver]

hello,i need some help
R1 = B1(2, 5) = {(x, y) ∈ R2 | (x − 2)^2 + (y − 5)^2 ≤ 1}
f1(x, y) = 1/( x2+y2 )
i need to find the intersection domain definition.
and to find the absolute extreme of f1 .
tnx,and hope you understand what i mean/

 

[Dr.Peterson]

hello,i need some help
R1 = B1(2, 5) = {(x, y) ∈ R2 | (x − 2)^2 + (y − 5)^2 ≤ 1}
f1(x, y) = 1/( x2+y2 )
i need to find the intersection domain definition.
and to find the absolute extreme of f1 .
tnx,and hope you understand what i mean/

No, I don't, quite.

What does "intersection domain definition" mean?

Did you mean f₁(x, y) = 1/( x²+y² ), that is, f_1(x, y) = 1/( x^2+y^2 ) ?

Are you asking for the absolute maximum and/or minimum of f₁ over the set R₁?

What methods do you know, and what did you try? Please show some work, which helps us know what you need help with:

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