关键是凑!
根据柯西不等式
x+2y=(1/√2)*(√2x)+(2/√3)*(√3y)≤√[(1/2+4/3)(2x^2+3y^2)]=√11
得证.
2x2+3y2≤6,求证x+2y≤根号11
2x2+3y2≤6,求证x+2y≤根号11
要用柯西不等式解,
要用柯西不等式解,
数学人气:291 ℃时间:2020-03-29 12:31:10
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