Sr Examen

Derivada de y=ln*sin^4x

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

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Solución

Ha introducido [src]
          4   
log(x)*sin (x)
log(x)sin4(x)\log{\left(x \right)} \sin^{4}{\left(x \right)}
log(x)*sin(x)^4
Solución detallada
  1. Se aplica la regla de la derivada de una multiplicación:

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

    f(x)=log(x)f{\left(x \right)} = \log{\left(x \right)}; calculamos ddxf(x)\frac{d}{d x} f{\left(x \right)}:

    1. Derivado log(x)\log{\left(x \right)} es 1x\frac{1}{x}.

    g(x)=sin4(x)g{\left(x \right)} = \sin^{4}{\left(x \right)}; calculamos ddxg(x)\frac{d}{d x} g{\left(x \right)}:

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

    2. Según el principio, aplicamos: u4u^{4} tenemos 4u34 u^{3}

    3. Luego se aplica una cadena de reglas. Multiplicamos por ddxsin(x)\frac{d}{d x} \sin{\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)}

      Como resultado de la secuencia de reglas:

      4sin3(x)cos(x)4 \sin^{3}{\left(x \right)} \cos{\left(x \right)}

    Como resultado de: 4log(x)sin3(x)cos(x)+sin4(x)x4 \log{\left(x \right)} \sin^{3}{\left(x \right)} \cos{\left(x \right)} + \frac{\sin^{4}{\left(x \right)}}{x}

  2. Simplificamos:

    (4xlog(x)cos(x)+sin(x))sin3(x)x\frac{\left(4 x \log{\left(x \right)} \cos{\left(x \right)} + \sin{\left(x \right)}\right) \sin^{3}{\left(x \right)}}{x}


Respuesta:

(4xlog(x)cos(x)+sin(x))sin3(x)x\frac{\left(4 x \log{\left(x \right)} \cos{\left(x \right)} + \sin{\left(x \right)}\right) \sin^{3}{\left(x \right)}}{x}

Gráfica
02468-8-6-4-2-10105-5
Primera derivada [src]
   4                             
sin (x)        3                 
------- + 4*sin (x)*cos(x)*log(x)
   x                             
4log(x)sin3(x)cos(x)+sin4(x)x4 \log{\left(x \right)} \sin^{3}{\left(x \right)} \cos{\left(x \right)} + \frac{\sin^{4}{\left(x \right)}}{x}
Segunda derivada [src]
        /     2                                                      \
   2    |  sin (x)     /   2           2   \          8*cos(x)*sin(x)|
sin (x)*|- ------- - 4*\sin (x) - 3*cos (x)/*log(x) + ---------------|
        |      2                                             x       |
        \     x                                                      /
(4(sin2(x)3cos2(x))log(x)+8sin(x)cos(x)xsin2(x)x2)sin2(x)\left(- 4 \left(\sin^{2}{\left(x \right)} - 3 \cos^{2}{\left(x \right)}\right) \log{\left(x \right)} + \frac{8 \sin{\left(x \right)} \cos{\left(x \right)}}{x} - \frac{\sin^{2}{\left(x \right)}}{x^{2}}\right) \sin^{2}{\left(x \right)}
Tercera derivada [src]
  /   3        /   2           2   \               2                                                      \       
  |sin (x)   6*\sin (x) - 3*cos (x)/*sin(x)   6*sin (x)*cos(x)     /       2           2   \              |       
2*|------- - ------------------------------ - ---------------- - 4*\- 3*cos (x) + 5*sin (x)/*cos(x)*log(x)|*sin(x)
  |    3                   x                          2                                                   |       
  \   x                                              x                                                    /       
2(4(5sin2(x)3cos2(x))log(x)cos(x)6(sin2(x)3cos2(x))sin(x)x6sin2(x)cos(x)x2+sin3(x)x3)sin(x)2 \left(- 4 \left(5 \sin^{2}{\left(x \right)} - 3 \cos^{2}{\left(x \right)}\right) \log{\left(x \right)} \cos{\left(x \right)} - \frac{6 \left(\sin^{2}{\left(x \right)} - 3 \cos^{2}{\left(x \right)}\right) \sin{\left(x \right)}}{x} - \frac{6 \sin^{2}{\left(x \right)} \cos{\left(x \right)}}{x^{2}} + \frac{\sin^{3}{\left(x \right)}}{x^{3}}\right) \sin{\left(x \right)}
Gráfico
Derivada de y=ln*sin^4x