X1≥X2≥X3≥X4≥2,且X2+X3+X4≥X1,求证(X1+X2+X3+X4)²≤4•X1•X2•X3•X4•表示乘号,X1、X2、X3、X4分别表示数字
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![X1≥X2≥X3≥X4≥2,且X2+X3+X4≥X1,求证(X1+X2+X3+X4)²≤4•X1•X2•X3•X4•表示乘号,X1、X2、X3、X4分别表示数字](/uploads/image/z/2654453-29-3.jpg?t=X1%E2%89%A5X2%E2%89%A5X3%E2%89%A5X4%E2%89%A52%2C%E4%B8%94X2%2BX3%2BX4%E2%89%A5X1%2C%E6%B1%82%E8%AF%81%EF%BC%88X1%2BX2%2BX3%2BX4%EF%BC%89%26sup2%3B%E2%89%A44%26%238226%3BX1%26%238226%3BX2%26%238226%3BX3%26%238226%3BX4%26%238226%3B%E8%A1%A8%E7%A4%BA%E4%B9%98%E5%8F%B7%2CX1%E3%80%81X2%E3%80%81X3%E3%80%81X4%E5%88%86%E5%88%AB%E8%A1%A8%E7%A4%BA%E6%95%B0%E5%AD%97)
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X1≥X2≥X3≥X4≥2,且X2+X3+X4≥X1,求证(X1+X2+X3+X4)²≤4•X1•X2•X3•X4•表示乘号,X1、X2、X3、X4分别表示数字
X1≥X2≥X3≥X4≥2,且X2+X3+X4≥X1,求证(X1+X2+X3+X4)²≤4•X1•X2•X3•X4
•表示乘号,X1、X2、X3、X4分别表示数字
X1≥X2≥X3≥X4≥2,且X2+X3+X4≥X1,求证(X1+X2+X3+X4)²≤4•X1•X2•X3•X4•表示乘号,X1、X2、X3、X4分别表示数字
令x1=k(x2+x3+x4)
1/3(x2+x3+x4)