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tan(x)^2/x^3

Derivada de tan(x)^2/x^3

Función f() - derivada -er orden en el punto
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Gráfico:

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Solución

Ha introducido [src]
   2   
tan (x)
-------
    3  
   x   
tan2(x)x3\frac{\tan^{2}{\left(x \right)}}{x^{3}}
tan(x)^2/x^3
Solución detallada
  1. Se aplica la regla de la derivada parcial:

    ddxf(x)g(x)=f(x)ddxg(x)+g(x)ddxf(x)g2(x)\frac{d}{d x} \frac{f{\left(x \right)}}{g{\left(x \right)}} = \frac{- f{\left(x \right)} \frac{d}{d x} g{\left(x \right)} + g{\left(x \right)} \frac{d}{d x} f{\left(x \right)}}{g^{2}{\left(x \right)}}

    f(x)=tan2(x)f{\left(x \right)} = \tan^{2}{\left(x \right)} y g(x)=x3g{\left(x \right)} = x^{3}.

    Para calcular ddxf(x)\frac{d}{d x} f{\left(x \right)}:

    1. Sustituimos u=tan(x)u = \tan{\left(x \right)}.

    2. Según el principio, aplicamos: u2u^{2} tenemos 2u2 u

    3. Luego se aplica una cadena de reglas. Multiplicamos por ddxtan(x)\frac{d}{d x} \tan{\left(x \right)}:

      1. Reescribimos las funciones para diferenciar:

        tan(x)=sin(x)cos(x)\tan{\left(x \right)} = \frac{\sin{\left(x \right)}}{\cos{\left(x \right)}}

      2. Se aplica la regla de la derivada parcial:

        ddxf(x)g(x)=f(x)ddxg(x)+g(x)ddxf(x)g2(x)\frac{d}{d x} \frac{f{\left(x \right)}}{g{\left(x \right)}} = \frac{- f{\left(x \right)} \frac{d}{d x} g{\left(x \right)} + g{\left(x \right)} \frac{d}{d x} f{\left(x \right)}}{g^{2}{\left(x \right)}}

        f(x)=sin(x)f{\left(x \right)} = \sin{\left(x \right)} y g(x)=cos(x)g{\left(x \right)} = \cos{\left(x \right)}.

        Para calcular ddxf(x)\frac{d}{d x} f{\left(x \right)}:

        1. La derivada del seno es igual al coseno:

          ddxsin(x)=cos(x)\frac{d}{d x} \sin{\left(x \right)} = \cos{\left(x \right)}

        Para calcular ddxg(x)\frac{d}{d x} g{\left(x \right)}:

        1. La derivada del coseno es igual a menos el seno:

          ddxcos(x)=sin(x)\frac{d}{d x} \cos{\left(x \right)} = - \sin{\left(x \right)}

        Ahora aplicamos la regla de la derivada de una divesión:

        sin2(x)+cos2(x)cos2(x)\frac{\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}}{\cos^{2}{\left(x \right)}}

      Como resultado de la secuencia de reglas:

      2(sin2(x)+cos2(x))tan(x)cos2(x)\frac{2 \left(\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}\right) \tan{\left(x \right)}}{\cos^{2}{\left(x \right)}}

    Para calcular ddxg(x)\frac{d}{d x} g{\left(x \right)}:

    1. Según el principio, aplicamos: x3x^{3} tenemos 3x23 x^{2}

    Ahora aplicamos la regla de la derivada de una divesión:

    2x3(sin2(x)+cos2(x))tan(x)cos2(x)3x2tan2(x)x6\frac{\frac{2 x^{3} \left(\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}\right) \tan{\left(x \right)}}{\cos^{2}{\left(x \right)}} - 3 x^{2} \tan^{2}{\left(x \right)}}{x^{6}}

  2. Simplificamos:

    2xsin(x)cos3(x)3tan2(x)x4\frac{\frac{2 x \sin{\left(x \right)}}{\cos^{3}{\left(x \right)}} - 3 \tan^{2}{\left(x \right)}}{x^{4}}


Respuesta:

2xsin(x)cos3(x)3tan2(x)x4\frac{\frac{2 x \sin{\left(x \right)}}{\cos^{3}{\left(x \right)}} - 3 \tan^{2}{\left(x \right)}}{x^{4}}

Gráfica
02468-8-6-4-2-1010-50005000
Primera derivada [src]
       2      /         2   \       
  3*tan (x)   \2 + 2*tan (x)/*tan(x)
- --------- + ----------------------
       4                 3          
      x                 x           
(2tan2(x)+2)tan(x)x33tan2(x)x4\frac{\left(2 \tan^{2}{\left(x \right)} + 2\right) \tan{\left(x \right)}}{x^{3}} - \frac{3 \tan^{2}{\left(x \right)}}{x^{4}}
Segunda derivada [src]
  /                                     2        /       2   \       \
  |/       2   \ /         2   \   6*tan (x)   6*\1 + tan (x)/*tan(x)|
2*|\1 + tan (x)/*\1 + 3*tan (x)/ + --------- - ----------------------|
  |                                     2                x           |
  \                                    x                             /
----------------------------------------------------------------------
                                   3                                  
                                  x                                   
2((tan2(x)+1)(3tan2(x)+1)6(tan2(x)+1)tan(x)x+6tan2(x)x2)x3\frac{2 \left(\left(\tan^{2}{\left(x \right)} + 1\right) \left(3 \tan^{2}{\left(x \right)} + 1\right) - \frac{6 \left(\tan^{2}{\left(x \right)} + 1\right) \tan{\left(x \right)}}{x} + \frac{6 \tan^{2}{\left(x \right)}}{x^{2}}\right)}{x^{3}}
Tercera derivada [src]
  /        2        /       2   \ /         2   \                                               /       2   \       \
  |  30*tan (x)   9*\1 + tan (x)/*\1 + 3*tan (x)/     /       2   \ /         2   \          36*\1 + tan (x)/*tan(x)|
2*|- ---------- - ------------------------------- + 4*\1 + tan (x)/*\2 + 3*tan (x)/*tan(x) + -----------------------|
  |       3                      x                                                                       2          |
  \      x                                                                                              x           /
---------------------------------------------------------------------------------------------------------------------
                                                           3                                                         
                                                          x                                                          
2(4(tan2(x)+1)(3tan2(x)+2)tan(x)9(tan2(x)+1)(3tan2(x)+1)x+36(tan2(x)+1)tan(x)x230tan2(x)x3)x3\frac{2 \left(4 \left(\tan^{2}{\left(x \right)} + 1\right) \left(3 \tan^{2}{\left(x \right)} + 2\right) \tan{\left(x \right)} - \frac{9 \left(\tan^{2}{\left(x \right)} + 1\right) \left(3 \tan^{2}{\left(x \right)} + 1\right)}{x} + \frac{36 \left(\tan^{2}{\left(x \right)} + 1\right) \tan{\left(x \right)}}{x^{2}} - \frac{30 \tan^{2}{\left(x \right)}}{x^{3}}\right)}{x^{3}}
Gráfico
Derivada de tan(x)^2/x^3