求导数的问题V=(1/3)π(r²-h²)h-----------------对h求导书上算出来是(1/3)π(r²-3h²)我算出来怎么是(1/3)π(2rh+r²-3h²)上面的π是圆周率的符号.谁帮我说一下问题出在哪里了?
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![求导数的问题V=(1/3)π(r²-h²)h-----------------对h求导书上算出来是(1/3)π(r²-3h²)我算出来怎么是(1/3)π(2rh+r²-3h²)上面的π是圆周率的符号.谁帮我说一下问题出在哪里了?](/uploads/image/z/13004066-2-6.jpg?t=%E6%B1%82%E5%AF%BC%E6%95%B0%E7%9A%84%E9%97%AE%E9%A2%98V%3D%281%2F3%29%CF%80%28r%26sup2%3B-h%26sup2%3B%29h-----------------%E5%AF%B9h%E6%B1%82%E5%AF%BC%E4%B9%A6%E4%B8%8A%E7%AE%97%E5%87%BA%E6%9D%A5%E6%98%AF%281%2F3%29%CF%80%28r%26sup2%3B-3h%26sup2%3B%29%E6%88%91%E7%AE%97%E5%87%BA%E6%9D%A5%E6%80%8E%E4%B9%88%E6%98%AF%281%2F3%29%CF%80%282rh%2Br%26sup2%3B-3h%26sup2%3B%29%E4%B8%8A%E9%9D%A2%E7%9A%84%CF%80%E6%98%AF%E5%9C%86%E5%91%A8%E7%8E%87%E7%9A%84%E7%AC%A6%E5%8F%B7.%E8%B0%81%E5%B8%AE%E6%88%91%E8%AF%B4%E4%B8%80%E4%B8%8B%E9%97%AE%E9%A2%98%E5%87%BA%E5%9C%A8%E5%93%AA%E9%87%8C%E4%BA%86%3F)
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