1<?xml version='1.0'?> 2<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN' 3 'http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd' 4 [<!ENTITY mathml 'http://www.w3.org/1998/Math/MathML'>]> 5<html xmlns='http://www.w3.org/1999/xhtml'> 6<head><title>atanh1</title> 7<!-- MathML created with MathCast Equation Editor version 0.89 --> 8</head> 9<body> 10<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> 11 <mrow> 12 <mtext>atanh</mtext> 13 <mfenced> 14 <mrow> 15 <mi>x</mi> 16 </mrow> 17 </mfenced> 18 <mo>=</mo> 19 <mfrac> 20 <mrow> 21 <mi>ln</mi> 22 <mfenced> 23 <mrow> 24 <mfrac> 25 <mrow> 26 <mn>1</mn> 27 <mo>+</mo> 28 <mi>x</mi> 29 </mrow> 30 <mrow> 31 <mn>1</mn> 32 <mo>−</mo> 33 <mi>x</mi> 34 </mrow> 35 </mfrac> 36 </mrow> 37 </mfenced> 38 </mrow> 39 <mn>2</mn> 40 </mfrac> 41 </mrow> 42</math> 43</body> 44</html> 45