如何用matlab定义系数和自变量?比如有方程y=a*x^2+b*x+c;如何定义时,区别的定义a,b,c为系数,x为自变量.然后去方程最小值时,用a,b,c表示.x min=-2a/b;如果用syms a,b,c,y,x;那a,b,c,x,y;地位没区别.最后不是
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![如何用matlab定义系数和自变量?比如有方程y=a*x^2+b*x+c;如何定义时,区别的定义a,b,c为系数,x为自变量.然后去方程最小值时,用a,b,c表示.x min=-2a/b;如果用syms a,b,c,y,x;那a,b,c,x,y;地位没区别.最后不是](/uploads/image/z/3763245-21-5.jpg?t=%E5%A6%82%E4%BD%95%E7%94%A8matlab%E5%AE%9A%E4%B9%89%E7%B3%BB%E6%95%B0%E5%92%8C%E8%87%AA%E5%8F%98%E9%87%8F%3F%E6%AF%94%E5%A6%82%E6%9C%89%E6%96%B9%E7%A8%8By%3Da%2Ax%5E2%2Bb%2Ax%2Bc%3B%E5%A6%82%E4%BD%95%E5%AE%9A%E4%B9%89%E6%97%B6%2C%E5%8C%BA%E5%88%AB%E7%9A%84%E5%AE%9A%E4%B9%89a%2Cb%2Cc%E4%B8%BA%E7%B3%BB%E6%95%B0%2Cx%E4%B8%BA%E8%87%AA%E5%8F%98%E9%87%8F.%E7%84%B6%E5%90%8E%E5%8E%BB%E6%96%B9%E7%A8%8B%E6%9C%80%E5%B0%8F%E5%80%BC%E6%97%B6%2C%E7%94%A8a%2Cb%2Cc%E8%A1%A8%E7%A4%BA.x+min%3D-2a%2Fb%3B%E5%A6%82%E6%9E%9C%E7%94%A8syms+a%2Cb%2Cc%2Cy%2Cx%3B%E9%82%A3a%2Cb%2Cc%2Cx%2Cy%3B%E5%9C%B0%E4%BD%8D%E6%B2%A1%E5%8C%BA%E5%88%AB.%E6%9C%80%E5%90%8E%E4%B8%8D%E6%98%AF)
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