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cos(x^(2/3))/(sin(3*x)+2^x)

Derivada de cos(x^(2/3))/(sin(3*x)+2^x)

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

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Solución

Ha introducido [src]
     / 2/3\  
  cos\x   /  
-------------
            x
sin(3*x) + 2 
cos(x23)2x+sin(3x)\frac{\cos{\left(x^{\frac{2}{3}} \right)}}{2^{x} + \sin{\left(3 x \right)}}
cos(x^(2/3))/(sin(3*x) + 2^x)
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)=cos(x23)f{\left(x \right)} = \cos{\left(x^{\frac{2}{3}} \right)} y g(x)=2x+sin(3x)g{\left(x \right)} = 2^{x} + \sin{\left(3 x \right)}.

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

    1. Sustituimos u=x23u = x^{\frac{2}{3}}.

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

      dducos(u)=sin(u)\frac{d}{d u} \cos{\left(u \right)} = - \sin{\left(u \right)}

    3. Luego se aplica una cadena de reglas. Multiplicamos por ddxx23\frac{d}{d x} x^{\frac{2}{3}}:

      1. Según el principio, aplicamos: x23x^{\frac{2}{3}} tenemos 23x3\frac{2}{3 \sqrt[3]{x}}

      Como resultado de la secuencia de reglas:

      2sin(x23)3x3- \frac{2 \sin{\left(x^{\frac{2}{3}} \right)}}{3 \sqrt[3]{x}}

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

    1. diferenciamos 2x+sin(3x)2^{x} + \sin{\left(3 x \right)} miembro por miembro:

      1. ddx2x=2xlog(2)\frac{d}{d x} 2^{x} = 2^{x} \log{\left(2 \right)}

      2. Sustituimos u=3xu = 3 x.

      3. La derivada del seno es igual al coseno:

        ddusin(u)=cos(u)\frac{d}{d u} \sin{\left(u \right)} = \cos{\left(u \right)}

      4. Luego se aplica una cadena de reglas. Multiplicamos por ddx3x\frac{d}{d x} 3 x:

        1. La derivada del producto de una constante por función es igual al producto de esta constante por la derivada de esta función.

          1. Según el principio, aplicamos: xx tenemos 11

          Entonces, como resultado: 33

        Como resultado de la secuencia de reglas:

        3cos(3x)3 \cos{\left(3 x \right)}

      Como resultado de: 2xlog(2)+3cos(3x)2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}

    Ahora aplicamos la regla de la derivada de una divesión:

    (2xlog(2)+3cos(3x))cos(x23)2(2x+sin(3x))sin(x23)3x3(2x+sin(3x))2\frac{- \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right) \cos{\left(x^{\frac{2}{3}} \right)} - \frac{2 \left(2^{x} + \sin{\left(3 x \right)}\right) \sin{\left(x^{\frac{2}{3}} \right)}}{3 \sqrt[3]{x}}}{\left(2^{x} + \sin{\left(3 x \right)}\right)^{2}}

  2. Simplificamos:

    x3(2xlog(2)+3cos(3x))cos(x23)+2(2x+sin(3x))sin(x23)3x3(2x+sin(3x))2- \frac{\sqrt[3]{x} \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right) \cos{\left(x^{\frac{2}{3}} \right)} + \frac{2 \left(2^{x} + \sin{\left(3 x \right)}\right) \sin{\left(x^{\frac{2}{3}} \right)}}{3}}{\sqrt[3]{x} \left(2^{x} + \sin{\left(3 x \right)}\right)^{2}}


Respuesta:

x3(2xlog(2)+3cos(3x))cos(x23)+2(2x+sin(3x))sin(x23)3x3(2x+sin(3x))2- \frac{\sqrt[3]{x} \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right) \cos{\left(x^{\frac{2}{3}} \right)} + \frac{2 \left(2^{x} + \sin{\left(3 x \right)}\right) \sin{\left(x^{\frac{2}{3}} \right)}}{3}}{\sqrt[3]{x} \left(2^{x} + \sin{\left(3 x \right)}\right)^{2}}

Gráfica
02468-8-6-4-2-10105-5
Primera derivada [src]
/               x       \    / 2/3\              / 2/3\      
\-3*cos(3*x) - 2 *log(2)/*cos\x   /         2*sin\x   /      
----------------------------------- - -----------------------
                         2              3 ___ /            x\
          /            x\             3*\/ x *\sin(3*x) + 2 /
          \sin(3*x) + 2 /                                    
(2xlog(2)3cos(3x))cos(x23)(2x+sin(3x))22sin(x23)3x3(2x+sin(3x))\frac{\left(- 2^{x} \log{\left(2 \right)} - 3 \cos{\left(3 x \right)}\right) \cos{\left(x^{\frac{2}{3}} \right)}}{\left(2^{x} + \sin{\left(3 x \right)}\right)^{2}} - \frac{2 \sin{\left(x^{\frac{2}{3}} \right)}}{3 \sqrt[3]{x} \left(2^{x} + \sin{\left(3 x \right)}\right)}
Segunda derivada [src]
                                /                                                    2\                                                 
    /                 / 2/3\\   |                            /              x       \ |                                                 
    |     / 2/3\   sin\x   /|   |              x    2      2*\3*cos(3*x) + 2 *log(2)/ |    / 2/3\                                       
  2*|2*cos\x   / - ---------|   |9*sin(3*x) - 2 *log (2) + ---------------------------|*cos\x   /                                       
    |                  2/3  |   |                                  x                  |               /              x       \    / 2/3\
    \                 x     /   \                                 2  + sin(3*x)       /             4*\3*cos(3*x) + 2 *log(2)/*sin\x   /
- --------------------------- + ----------------------------------------------------------------- + ------------------------------------
                2/3                                        x                                                3 ___ / x           \       
             9*x                                          2  + sin(3*x)                                   3*\/ x *\2  + sin(3*x)/       
----------------------------------------------------------------------------------------------------------------------------------------
                                                              x                                                                         
                                                             2  + sin(3*x)                                                              
(2xlog(2)2+9sin(3x)+2(2xlog(2)+3cos(3x))22x+sin(3x))cos(x23)2x+sin(3x)+4(2xlog(2)+3cos(3x))sin(x23)3x3(2x+sin(3x))2(2cos(x23)sin(x23)x23)9x232x+sin(3x)\frac{\frac{\left(- 2^{x} \log{\left(2 \right)}^{2} + 9 \sin{\left(3 x \right)} + \frac{2 \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right)^{2}}{2^{x} + \sin{\left(3 x \right)}}\right) \cos{\left(x^{\frac{2}{3}} \right)}}{2^{x} + \sin{\left(3 x \right)}} + \frac{4 \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right) \sin{\left(x^{\frac{2}{3}} \right)}}{3 \sqrt[3]{x} \left(2^{x} + \sin{\left(3 x \right)}\right)} - \frac{2 \left(2 \cos{\left(x^{\frac{2}{3}} \right)} - \frac{\sin{\left(x^{\frac{2}{3}} \right)}}{x^{\frac{2}{3}}}\right)}{9 x^{\frac{2}{3}}}}{2^{x} + \sin{\left(3 x \right)}}
Tercera derivada [src]
                                            /                                                      3                                                        \                                                                                                                                       
                                            |                              /              x       \      /               x    2   \ /              x       \|               /                                                    2\                                                                 
                                            |                x    3      6*\3*cos(3*x) + 2 *log(2)/    6*\-9*sin(3*x) + 2 *log (2)/*\3*cos(3*x) + 2 *log(2)/|    / 2/3\     |                            /              x       \ |               /                 / 2/3\\                         
                                            |-27*cos(3*x) + 2 *log (2) + --------------------------- - -----------------------------------------------------|*cos\x   /     |              x    2      2*\3*cos(3*x) + 2 *log(2)/ |    / 2/3\     |     / 2/3\   sin\x   /| /              x       \
                                            |                                                 2                             x                               |             2*|9*sin(3*x) - 2 *log (2) + ---------------------------|*sin\x   /   2*|2*cos\x   / - ---------|*\3*cos(3*x) + 2 *log(2)/
       / 2/3\        / 2/3\        / 2/3\   |                                  / x           \                             2  + sin(3*x)                    |               |                                  x                  |               |                  2/3  |                         
  8*sin\x   /   4*cos\x   /   8*sin\x   /   \                                  \2  + sin(3*x)/                                                              /               \                                 2  + sin(3*x)       /               \                 x     /                         
- ----------- + ----------- + ----------- - --------------------------------------------------------------------------------------------------------------------------- - ------------------------------------------------------------------- + ----------------------------------------------------
        7/3           5/3         27*x                                                              x                                                                                            3 ___ / x           \                                            2/3 / x           \               
    27*x           9*x                                                                             2  + sin(3*x)                                                                                 \/ x *\2  + sin(3*x)/                                         3*x   *\2  + sin(3*x)/               
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                            x                                                                                                                                                       
                                                                                                                                           2  + sin(3*x)                                                                                                                                            
(2xlog(2)327cos(3x)6(2xlog(2)+3cos(3x))(2xlog(2)29sin(3x))2x+sin(3x)+6(2xlog(2)+3cos(3x))3(2x+sin(3x))2)cos(x23)2x+sin(3x)+8sin(x23)27x2(2xlog(2)2+9sin(3x)+2(2xlog(2)+3cos(3x))22x+sin(3x))sin(x23)x3(2x+sin(3x))+2(2xlog(2)+3cos(3x))(2cos(x23)sin(x23)x23)3x23(2x+sin(3x))+4cos(x23)9x538sin(x23)27x732x+sin(3x)\frac{- \frac{\left(2^{x} \log{\left(2 \right)}^{3} - 27 \cos{\left(3 x \right)} - \frac{6 \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right) \left(2^{x} \log{\left(2 \right)}^{2} - 9 \sin{\left(3 x \right)}\right)}{2^{x} + \sin{\left(3 x \right)}} + \frac{6 \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right)^{3}}{\left(2^{x} + \sin{\left(3 x \right)}\right)^{2}}\right) \cos{\left(x^{\frac{2}{3}} \right)}}{2^{x} + \sin{\left(3 x \right)}} + \frac{8 \sin{\left(x^{\frac{2}{3}} \right)}}{27 x} - \frac{2 \left(- 2^{x} \log{\left(2 \right)}^{2} + 9 \sin{\left(3 x \right)} + \frac{2 \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right)^{2}}{2^{x} + \sin{\left(3 x \right)}}\right) \sin{\left(x^{\frac{2}{3}} \right)}}{\sqrt[3]{x} \left(2^{x} + \sin{\left(3 x \right)}\right)} + \frac{2 \left(2^{x} \log{\left(2 \right)} + 3 \cos{\left(3 x \right)}\right) \left(2 \cos{\left(x^{\frac{2}{3}} \right)} - \frac{\sin{\left(x^{\frac{2}{3}} \right)}}{x^{\frac{2}{3}}}\right)}{3 x^{\frac{2}{3}} \left(2^{x} + \sin{\left(3 x \right)}\right)} + \frac{4 \cos{\left(x^{\frac{2}{3}} \right)}}{9 x^{\frac{5}{3}}} - \frac{8 \sin{\left(x^{\frac{2}{3}} \right)}}{27 x^{\frac{7}{3}}}}{2^{x} + \sin{\left(3 x \right)}}
Gráfico
Derivada de cos(x^(2/3))/(sin(3*x)+2^x)