[多變] 問極值?

[chat543 (小ㄐ)]

Find the maximum and minimum values of f(x,y,z) =x-2y+z , with the

constraints x^2+y^2+z^2 = 1 and x+y+z=0.



他有兩個限制條件~不知道要怎嚜求?

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