[考古] 台大101微C
去年台大(C)第三題
use lagrange multiplier or any other method to find the maximum and minimum
of f(x,y)=x^3+y^3+3xy in the closed unit disk x^2+y^2≦1
我看訪間的解答寫求他極小的值 過程都寫得複雜
有比用圓參數化去求極值更好的方法嗎
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