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 Tanh

 http://functions.wolfram.com/01.21.03.0059.01

 Input Form

 Tanh[(7 Pi I)/10] == Root[1 + 10 #1^2 + 5 #1^4 & , 1]

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["Tanh", "[", FractionBox[RowBox[List["7", "\[Pi]", " ", "\[ImaginaryI]"]], "10"], "]"]], "\[Equal]", RowBox[List["Root", "[", RowBox[List[RowBox[List[RowBox[List["1", "+", RowBox[List["10", " ", SuperscriptBox["#1", "2"]]], "+", RowBox[List["5", " ", SuperscriptBox["#1", "4"]]]]], "&"]], ",", "1"]], "]"]]]]]]

 MathML Form

 tanh ( 7 π 10 ) ( z ; 5 z 4 + 10 z 2 + 1 ) 1 - 1 7 10 -1 Subscript CompoundExpression z 5 z 4 10 z 2 1 1 -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Tanh", "[", FractionBox[RowBox[List["7", " ", "\[Pi]", " ", "\[ImaginaryI]"]], "10"], "]"]], "]"]], "\[RuleDelayed]", RowBox[List["Root", "[", RowBox[List[RowBox[List[RowBox[List["1", "+", RowBox[List["10", " ", SuperscriptBox["#1", "2"]]], "+", RowBox[List["5", " ", SuperscriptBox["#1", "4"]]]]], "&"]], ",", "1"]], "]"]]]]]]

 Date Added to functions.wolfram.com (modification date)

 2001-10-29

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