式9: natural log left parenthesis, StartFraction, 1 Over "y" , EndFraction , right parenthesis times StartFraction, 1 Over "y" , EndFraction equals negative StartFraction, 1 Over "x" , EndFraction natural log left parenthesis, "x" , right parenthesisln1y·1y=−1xlnx
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式10: natural log left parenthesis, StartFraction, 1 Over "y" , EndFraction , right parenthesis times "e" Superscript, ln left parenthesis, StartFraction, 1 Over "y" , EndFraction , right parenthesis , Baseline equals negative StartFraction, 1 Over "x" , EndFraction natural log left parenthesis, "x" , right parenthesisln1y·eln1y=−1xlnx
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式11: natural log left parenthesis, StartFraction, 1 Over "y" , EndFraction , right parenthesis equals "W" left parenthesis, negative StartFraction, 1 Over "x" , EndFraction ln left parenthesis, "x" , right parenthesis , right parenthesisln1y=W−1xlnx
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式12: negative natural log left parenthesis, StartFraction, 1 Over "y" , EndFraction , right parenthesis equals negative "W" left parenthesis, negative StartFraction, 1 Over "x" , EndFraction ln left parenthesis, "x" , right parenthesis , right parenthesis−ln1y=−W−1xlnx
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式13: natural log left parenthesis, left parenthesis, StartFraction, 1 Over "y" , EndFraction , right parenthesis to the negative 1st power , right parenthesis equals negative "W" left parenthesis, negative StartFraction, 1 Over "x" , EndFraction ln left parenthesis, "x" , right parenthesis , right parenthesisln1y−1=−W−1xlnx
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式14: natural log left parenthesis, StartFraction, 1 Over StartNestedFraction, 1 NestedOver "y" , EndNestedFraction , EndFraction , right parenthesis equals negative "W" left parenthesis, negative StartFraction, 1 Over "x" , EndFraction ln left parenthesis, "x" , right parenthesis , right parenthesisln11y=−W−1xlnx
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式15: natural log left parenthesis, "y" , right parenthesis equals negative "W" left parenthesis, negative StartFraction, 1 Over "x" , EndFraction ln left parenthesis, "x" , right parenthesis , right parenthesislny=−W−1xlnx
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式16: "y" equals "e" Superscript, negative "W" left parenthesis, negative StartFraction, ln left parenthesis, "x" , right parenthesis Over "x" , EndFraction , right parenthesis , Baseliney=e−W−lnxx