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例1已知x,y,z∈R~+,且1/x+2/y+3/z= 1,求x+y/2+z/3的最小值.(第11届(00年)“希望杯”)解构造向量
Example 1 knows x,y,z∈R~+, and 1/x+2/y+3/z= 1, find the minimum value of x+y/2+z/3. (The 11th (00th )“Hope Cup”) Solution Vector