dx/dy=1/y'的三阶导数我算出来的是(3y''-y'''y')/(y')^5答案给的是(3y''^2-y'''y')/(y')^5
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![dx/dy=1/y'的三阶导数我算出来的是(3y''-y'''y')/(y')^5答案给的是(3y''^2-y'''y')/(y')^5](/uploads/image/z/5393191-31-1.jpg?t=dx%2Fdy%3D1%2Fy%27%E7%9A%84%E4%B8%89%E9%98%B6%E5%AF%BC%E6%95%B0%E6%88%91%E7%AE%97%E5%87%BA%E6%9D%A5%E7%9A%84%E6%98%AF%283y%27%27-y%27%27%27y%27%29%2F%28y%27%29%5E5%E7%AD%94%E6%A1%88%E7%BB%99%E7%9A%84%E6%98%AF%283y%27%27%5E2-y%27%27%27y%27%29%2F%28y%27%29%5E5)
dx/dy=1/y'的三阶导数我算出来的是(3y''-y'''y')/(y')^5答案给的是(3y''^2-y'''y')/(y')^5
dx/dy=1/y'的三阶导数
我算出来的是(3y''-y'''y')/(y')^5
答案给的是(3y''^2-y'''y')/(y')^5
dx/dy=1/y'的三阶导数我算出来的是(3y''-y'''y')/(y')^5答案给的是(3y''^2-y'''y')/(y')^5
如图.