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 Cosh

 http://functions.wolfram.com/01.20.06.0008.02

 Input Form

 Cosh[z]^3 \[Proportional] 1 + (3 z^2)/2 + (7 z^4)/8 + \[Ellipsis] /; (z -> 0)

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["Cosh", "[", "z", "]"]], "3"], "\[Proportional]", RowBox[List["1", "+", FractionBox[RowBox[List["3", " ", SuperscriptBox["z", "2"]]], "2"], "+", FractionBox[RowBox[List["7", " ", SuperscriptBox["z", "4"]]], "8"], "+", "\[Ellipsis]"]]]], "/;", RowBox[List["(", RowBox[List["z", "\[Rule]", "0"]], ")"]]]]]]

 MathML Form

 cosh 3 ( z ) 1 + 3 z 2 2 + 7 z 4 8 + /; ( z "\[Rule]" 0 ) Condition Proportional z 3 1 3 z 2 2 -1 7 z 4 8 -1 Rule z 0 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", SuperscriptBox[RowBox[List["Cosh", "[", "z_", "]"]], "3"], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["1", "+", FractionBox[RowBox[List["3", " ", SuperscriptBox["z", "2"]]], "2"], "+", FractionBox[RowBox[List["7", " ", SuperscriptBox["z", "4"]]], "8"], "+", "\[Ellipsis]"]], "/;", RowBox[List["(", RowBox[List["z", "\[Rule]", "0"]], ")"]]]]]]]]

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

 2001-10-29