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2.\u6839\u636e\u51e0\u4f55\u5173\u7cfb\uff0c\u6839\u636e\u7269\u4f53\u3001\u900f\u955c\u548c\u6210\u50cf\u5e73\u9762\u7684\u4f4d\u7f6e\u5173\u7cfb\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u4ee5\u4e0b\u5173\u7cfb\u5f0f\uff1a<\/p>\n

-1\/u+1\/v=1\/f<\/p>\n

-h'\/h=-v\/u<\/p>\n<\/p>\n

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v=f*u\/(u-f)<\/p>\n<\/p>\n

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h'\/h=-1\/(1-m)<\/p>\n<\/p>\n

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