devn00b
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EQ2EMu


			
				
					
						
						
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							<?xml version='1.0'?>
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN'
  'http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd'
  [<!ENTITY mathml 'http://www.w3.org/1998/Math/MathML'>]>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head><title>trigamma1</title>
<!-- MathML created with MathCast Equation Editor version 0.89 -->
</head>
<body>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mrow>
    <msup>
      <mi>&#x03C8;</mi>
      <mfenced>
        <mrow>
          <mn>1</mn>
        </mrow>
      </mfenced>
    </msup>
    <mfenced>
      <mrow>
        <mi>x</mi>
      </mrow>
    </mfenced>
    <mo>=</mo>
    <munderover>
      <mo>&#x2211;</mo>
      <mrow>
        <mi>k</mi>
        <mo>=</mo>
        <mn>0</mn>
      </mrow>
      <mi>&#x221E;</mi>
    </munderover>
    <mfrac>
      <mn>1</mn>
      <mrow>
        <msup>
          <mfenced>
            <mrow>
              <mi>k</mi>
              <mo>+</mo>
              <mi>x</mi>
            </mrow>
          </mfenced>
          <mn>2</mn>
        </msup>
      </mrow>
    </mfrac>
    <mo>=</mo>
    <mfrac>
      <mrow>
        <mo>&#x2202;</mo>
        <mi>&#x03C8;</mi>
        <mfenced>
          <mrow>
            <mi>x</mi>
          </mrow>
        </mfenced>
      </mrow>
      <mrow>
        <mo>&#x2202;</mo>
        <mi>x</mi>
      </mrow>
    </mfrac>
  </mrow>
</math>
</body>
</html>