[考古] 91政大國貿第四題

[amigomars (我要當瑛太的工作夥伴)]

4. Find the maximum and minimum values of

      x^2 + y^2 + z^2

subject to constraint conditions

      x^2   y^2   Z^2
     ____ + ___ +_____ = 1
      4      5     25

and

       z = x + y


--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 140.113.211.161
→ yhliu:Lagrange 乘數法. 考慮
→ yhliu:2x=λ(x/2)+μ, 2y=λ(2y/5)+μ,
→ yhliu:2z=λ(2z/25)-μ.
→ amigomars:謝謝!!!