Sr Examen

Derivada de y=((tgln)√x)

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

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Solución

Ha introducido [src]
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tan(log(x))*\/ x 
xtan(log(x))\sqrt{x} \tan{\left(\log{\left(x \right)} \right)}
tan(log(x))*sqrt(x)
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)=tan(log(x))f{\left(x \right)} = \tan{\left(\log{\left(x \right)} \right)}; calculamos ddxf(x)\frac{d}{d x} f{\left(x \right)}:

    1. Reescribimos las funciones para diferenciar:

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

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

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

      2. La derivada del seno es igual al coseno:

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

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

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

        Como resultado de la secuencia de reglas:

        cos(log(x))x\frac{\cos{\left(\log{\left(x \right)} \right)}}{x}

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

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

      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 ddxlog(x)\frac{d}{d x} \log{\left(x \right)}:

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

        Como resultado de la secuencia de reglas:

        sin(log(x))x- \frac{\sin{\left(\log{\left(x \right)} \right)}}{x}

      Ahora aplicamos la regla de la derivada de una divesión:

      sin2(log(x))x+cos2(log(x))xcos2(log(x))\frac{\frac{\sin^{2}{\left(\log{\left(x \right)} \right)}}{x} + \frac{\cos^{2}{\left(\log{\left(x \right)} \right)}}{x}}{\cos^{2}{\left(\log{\left(x \right)} \right)}}

    g(x)=xg{\left(x \right)} = \sqrt{x}; calculamos ddxg(x)\frac{d}{d x} g{\left(x \right)}:

    1. Según el principio, aplicamos: x\sqrt{x} tenemos 12x\frac{1}{2 \sqrt{x}}

    Como resultado de: x(sin2(log(x))x+cos2(log(x))x)cos2(log(x))+tan(log(x))2x\frac{\sqrt{x} \left(\frac{\sin^{2}{\left(\log{\left(x \right)} \right)}}{x} + \frac{\cos^{2}{\left(\log{\left(x \right)} \right)}}{x}\right)}{\cos^{2}{\left(\log{\left(x \right)} \right)}} + \frac{\tan{\left(\log{\left(x \right)} \right)}}{2 \sqrt{x}}

  2. Simplificamos:

    sin(2log(x))4+1xcos2(log(x))\frac{\frac{\sin{\left(2 \log{\left(x \right)} \right)}}{4} + 1}{\sqrt{x} \cos^{2}{\left(\log{\left(x \right)} \right)}}


Respuesta:

sin(2log(x))4+1xcos2(log(x))\frac{\frac{\sin{\left(2 \log{\left(x \right)} \right)}}{4} + 1}{\sqrt{x} \cos^{2}{\left(\log{\left(x \right)} \right)}}

Gráfica
02468-8-6-4-2-10105000-2500
Primera derivada [src]
       2                      
1 + tan (log(x))   tan(log(x))
---------------- + -----------
       ___               ___  
     \/ x            2*\/ x   
tan2(log(x))+1x+tan(log(x))2x\frac{\tan^{2}{\left(\log{\left(x \right)} \right)} + 1}{\sqrt{x}} + \frac{\tan{\left(\log{\left(x \right)} \right)}}{2 \sqrt{x}}
Segunda derivada [src]
       2           tan(log(x))   /       2        \                     
1 + tan (log(x)) - ----------- + \1 + tan (log(x))/*(-1 + 2*tan(log(x)))
                        4                                               
------------------------------------------------------------------------
                                   3/2                                  
                                  x                                     
(2tan(log(x))1)(tan2(log(x))+1)+tan2(log(x))tan(log(x))4+1x32\frac{\left(2 \tan{\left(\log{\left(x \right)} \right)} - 1\right) \left(\tan^{2}{\left(\log{\left(x \right)} \right)} + 1\right) + \tan^{2}{\left(\log{\left(x \right)} \right)} - \frac{\tan{\left(\log{\left(x \right)} \right)}}{4} + 1}{x^{\frac{3}{2}}}
Tercera derivada [src]
           2                                                                                         /       2        \                     
  3   3*tan (log(x))   3*tan(log(x))     /       2        \ /                         2        \   3*\1 + tan (log(x))/*(-1 + 2*tan(log(x)))
- - - -------------- + ------------- + 2*\1 + tan (log(x))/*\2 - 3*tan(log(x)) + 3*tan (log(x))/ + -----------------------------------------
  4         4                8                                                                                         2                    
--------------------------------------------------------------------------------------------------------------------------------------------
                                                                     5/2                                                                    
                                                                    x                                                                       
3(2tan(log(x))1)(tan2(log(x))+1)2+2(tan2(log(x))+1)(3tan2(log(x))3tan(log(x))+2)3tan2(log(x))4+3tan(log(x))834x52\frac{\frac{3 \left(2 \tan{\left(\log{\left(x \right)} \right)} - 1\right) \left(\tan^{2}{\left(\log{\left(x \right)} \right)} + 1\right)}{2} + 2 \left(\tan^{2}{\left(\log{\left(x \right)} \right)} + 1\right) \left(3 \tan^{2}{\left(\log{\left(x \right)} \right)} - 3 \tan{\left(\log{\left(x \right)} \right)} + 2\right) - \frac{3 \tan^{2}{\left(\log{\left(x \right)} \right)}}{4} + \frac{3 \tan{\left(\log{\left(x \right)} \right)}}{8} - \frac{3}{4}}{x^{\frac{5}{2}}}
Gráfico
Derivada de y=((tgln)√x)