x/(x + 1) < Log[1 + x] < x /; x > -1 && x != 0

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<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mrow> <mfrac> <mi> x </mi> <mrow> <mi> x </mi> <mo> + </mo> <mn> 1 </mn> </mrow> </mfrac> <mo> &lt; </mo> <mrow> <mi> log </mi> <mo> &#8289; </mo> <mo> ( </mo> <mrow> <mn> 1 </mn> <mo> + </mo> <mi> x </mi> </mrow> <mo> ) </mo> </mrow> <mo> &lt; </mo> <mi> x </mi> </mrow> <mo> /; </mo> <mrow> <mrow> <mi> x </mi> <mo> &gt; </mo> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </mrow> <mo> &#8743; </mo> <mrow> <mi> x </mi> <mo> &#8800; </mo> <mn> 0 </mn> </mrow> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <ci> Condition </ci> <apply> <lt /> <apply> <times /> <ci> x </ci> <apply> <power /> <apply> <plus /> <ci> x </ci> <cn type='integer'> 1 </cn> </apply> <cn type='integer'> -1 </cn> </apply> </apply> <apply> <ln /> <apply> <plus /> <cn type='integer'> 1 </cn> <ci> x </ci> </apply> </apply> <ci> x </ci> </apply> <apply> <and /> <apply> <gt /> <ci> x </ci> <cn type='integer'> -1 </cn> </apply> <apply> <neq /> <ci> x </ci> <cn type='integer'> 0 </cn> </apply> </apply> </apply> </annotation-xml> </semantics> </math>

Cell[BoxData[RowBox[List[RowBox[List[FractionBox["x", RowBox[List["x", "+", "1"]]], "<", RowBox[List["Log", "[", RowBox[List["1", "+", "x"]], "]"]], "<", "x"]], "/;", RowBox[List[RowBox[List["x", ">", RowBox[List["-", "1"]]]], "&&", RowBox[List["x", "\[NotEqual]", "0"]]]]]]]]

2001-10-29