Sr Examen

Derivada de y=((tg)(ln)√x)

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

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Solución

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

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

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

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

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

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

  2. Simplificamos:

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


Respuesta:

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

Gráfica
02468-8-6-4-2-1010-50005000
Primera derivada [src]
  ___ /tan(x)   /       2   \       \   log(x)*tan(x)
\/ x *|------ + \1 + tan (x)/*log(x)| + -------------
      \  x                          /          ___   
                                           2*\/ x    
x((tan2(x)+1)log(x)+tan(x)x)+log(x)tan(x)2x\sqrt{x} \left(\left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(x \right)} + \frac{\tan{\left(x \right)}}{x}\right) + \frac{\log{\left(x \right)} \tan{\left(x \right)}}{2 \sqrt{x}}
Segunda derivada [src]
                                                                     tan(x)   /       2   \                       
      /             /       2   \                                \   ------ + \1 + tan (x)/*log(x)                
  ___ |  tan(x)   2*\1 + tan (x)/     /       2   \              |     x                             log(x)*tan(x)
\/ x *|- ------ + --------------- + 2*\1 + tan (x)/*log(x)*tan(x)| + ----------------------------- - -------------
      |     2            x                                       |                 ___                      3/2   
      \    x                                                     /               \/ x                    4*x      
x(2(tan2(x)+1)log(x)tan(x)+2(tan2(x)+1)xtan(x)x2)+(tan2(x)+1)log(x)+tan(x)xxlog(x)tan(x)4x32\sqrt{x} \left(2 \left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(x \right)} \tan{\left(x \right)} + \frac{2 \left(\tan^{2}{\left(x \right)} + 1\right)}{x} - \frac{\tan{\left(x \right)}}{x^{2}}\right) + \frac{\left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(x \right)} + \frac{\tan{\left(x \right)}}{x}}{\sqrt{x}} - \frac{\log{\left(x \right)} \tan{\left(x \right)}}{4 x^{\frac{3}{2}}}
Tercera derivada [src]
                                                                                                                                               /             /       2   \                                \                  
                                                                                                                                               |  tan(x)   2*\1 + tan (x)/     /       2   \              |                  
                                                                                                           /tan(x)   /       2   \       \   3*|- ------ + --------------- + 2*\1 + tan (x)/*log(x)*tan(x)|                  
      /    /       2   \                                                         /       2   \       \   3*|------ + \1 + tan (x)/*log(x)|     |     2            x                                       |                  
  ___ |  3*\1 + tan (x)/   2*tan(x)     /       2   \ /         2   \          6*\1 + tan (x)/*tan(x)|     \  x                          /     \    x                                                     /   3*log(x)*tan(x)
\/ x *|- --------------- + -------- + 2*\1 + tan (x)/*\1 + 3*tan (x)/*log(x) + ----------------------| - --------------------------------- + -------------------------------------------------------------- + ---------------
      |          2             3                                                         x           |                    3/2                                               ___                                       5/2    
      \         x             x                                                                      /                 4*x                                              2*\/ x                                     8*x       
x(2(tan2(x)+1)(3tan2(x)+1)log(x)+6(tan2(x)+1)tan(x)x3(tan2(x)+1)x2+2tan(x)x3)+3(2(tan2(x)+1)log(x)tan(x)+2(tan2(x)+1)xtan(x)x2)2x3((tan2(x)+1)log(x)+tan(x)x)4x32+3log(x)tan(x)8x52\sqrt{x} \left(2 \left(\tan^{2}{\left(x \right)} + 1\right) \left(3 \tan^{2}{\left(x \right)} + 1\right) \log{\left(x \right)} + \frac{6 \left(\tan^{2}{\left(x \right)} + 1\right) \tan{\left(x \right)}}{x} - \frac{3 \left(\tan^{2}{\left(x \right)} + 1\right)}{x^{2}} + \frac{2 \tan{\left(x \right)}}{x^{3}}\right) + \frac{3 \left(2 \left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(x \right)} \tan{\left(x \right)} + \frac{2 \left(\tan^{2}{\left(x \right)} + 1\right)}{x} - \frac{\tan{\left(x \right)}}{x^{2}}\right)}{2 \sqrt{x}} - \frac{3 \left(\left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(x \right)} + \frac{\tan{\left(x \right)}}{x}\right)}{4 x^{\frac{3}{2}}} + \frac{3 \log{\left(x \right)} \tan{\left(x \right)}}{8 x^{\frac{5}{2}}}
Gráfico
Derivada de y=((tg)(ln)√x)