4.y=f(x)的反函数x=φ(y),(1)x=φ(y)与y=φ(x)是同一函数,(2)f'(x)=1/φ'(y)(3)f'(x)=1/φ'(x)为何由(1)(2)不能推出(3)
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![4.y=f(x)的反函数x=φ(y),(1)x=φ(y)与y=φ(x)是同一函数,(2)f'(x)=1/φ'(y)(3)f'(x)=1/φ'(x)为何由(1)(2)不能推出(3)](/uploads/image/z/5930958-30-8.jpg?t=4.y%3Df%28x%29%E7%9A%84%E5%8F%8D%E5%87%BD%E6%95%B0x%3D%CF%86%28y%29%2C%281%29x%3D%CF%86%28y%29%E4%B8%8Ey%3D%CF%86%28x%29%E6%98%AF%E5%90%8C%E4%B8%80%E5%87%BD%E6%95%B0%2C%282%29f%27%28x%29%3D1%2F%CF%86%27%28y%29%283%29f%27%28x%29%3D1%2F%CF%86%27%28x%29%E4%B8%BA%E4%BD%95%E7%94%B1%281%29%282%29%E4%B8%8D%E8%83%BD%E6%8E%A8%E5%87%BA%283%29)
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