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由於點(2,0)不在曲線上,設切點為(x,y)其中y=1/x.對曲線y=1/x求導得y'=-x^-2,則曲線過切點的斜率為-x^-2 .過切點的斜率應和過點(x,y)和(2,0)的斜率相等.即解得x=1,即切點為(1,1).過該點的切線的斜率為-1,…
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