admin百科知識 2022-02-13 10:30:18 求y=√(x(20-x)(x-10)平方)的最值,x屬於0~20求y=√(x(20-x)(x-10)平方)的最值,x屬於0~20網友廻答:匿名網友x(20-x)(x-10)^2=(-x^2 20x)(x^2-20x 100)=-(x^2-20x)(x^2-20x 100)=-(x^2-20x)^2-100(x^2-20x)=-[(x^2-20x)]-100(x^2-20x)-2500 2500=-[(x^2-20x) 50]^2 2500=-(x^2-20x 50)^2 2500y=√[2500-(x^2-20x 50)^2]=√{25... db標簽 生活常識_百科知識_各類知識大全»求y=√(x(20-x)(x-10)平方)的最值,x屬於0~20
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