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y=ln(4^x+tgx)

Derivada de y=ln(4^x+tgx)

Función f() - derivada -er orden en el punto
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Solución

Ha introducido [src]
   / x         \
log\4  + tan(x)/
log(4x+tan(x))\log{\left(4^{x} + \tan{\left(x \right)} \right)}
log(4^x + tan(x))
Solución detallada
  1. Sustituimos u=4x+tan(x)u = 4^{x} + \tan{\left(x \right)}.

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

  3. Luego se aplica una cadena de reglas. Multiplicamos por ddx(4x+tan(x))\frac{d}{d x} \left(4^{x} + \tan{\left(x \right)}\right):

    1. diferenciamos 4x+tan(x)4^{x} + \tan{\left(x \right)} miembro por miembro:

      1. ddx4x=4xlog(4)\frac{d}{d x} 4^{x} = 4^{x} \log{\left(4 \right)}

      2. Reescribimos las funciones para diferenciar:

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

      3. 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: 4xlog(4)+sin2(x)+cos2(x)cos2(x)4^{x} \log{\left(4 \right)} + \frac{\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}}{\cos^{2}{\left(x \right)}}

    Como resultado de la secuencia de reglas:

    4xlog(4)+sin2(x)+cos2(x)cos2(x)4x+tan(x)\frac{4^{x} \log{\left(4 \right)} + \frac{\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}}{\cos^{2}{\left(x \right)}}}{4^{x} + \tan{\left(x \right)}}

  4. Simplificamos:

    24xlog(2)cos2(x)+1(4x+tan(x))cos2(x)\frac{2 \cdot 4^{x} \log{\left(2 \right)} \cos^{2}{\left(x \right)} + 1}{\left(4^{x} + \tan{\left(x \right)}\right) \cos^{2}{\left(x \right)}}


Respuesta:

24xlog(2)cos2(x)+1(4x+tan(x))cos2(x)\frac{2 \cdot 4^{x} \log{\left(2 \right)} \cos^{2}{\left(x \right)} + 1}{\left(4^{x} + \tan{\left(x \right)}\right) \cos^{2}{\left(x \right)}}

Gráfica
02468-8-6-4-2-1010-100100
Primera derivada [src]
       2       x       
1 + tan (x) + 4 *log(4)
-----------------------
       x               
      4  + tan(x)      
4xlog(4)+tan2(x)+14x+tan(x)\frac{4^{x} \log{\left(4 \right)} + \tan^{2}{\left(x \right)} + 1}{4^{x} + \tan{\left(x \right)}}
Segunda derivada [src]
                                      2                         
             /       2       x       \                          
 x    2      \1 + tan (x) + 4 *log(4)/      /       2   \       
4 *log (4) - -------------------------- + 2*\1 + tan (x)/*tan(x)
                     x                                          
                    4  + tan(x)                                 
----------------------------------------------------------------
                           x                                    
                          4  + tan(x)                           
4xlog(4)2+2(tan2(x)+1)tan(x)(4xlog(4)+tan2(x)+1)24x+tan(x)4x+tan(x)\frac{4^{x} \log{\left(4 \right)}^{2} + 2 \left(\tan^{2}{\left(x \right)} + 1\right) \tan{\left(x \right)} - \frac{\left(4^{x} \log{\left(4 \right)} + \tan^{2}{\left(x \right)} + 1\right)^{2}}{4^{x} + \tan{\left(x \right)}}}{4^{x} + \tan{\left(x \right)}}
Tercera derivada [src]
                                                           3                                                                                              
               2                  /       2       x       \                                / x    2        /       2   \       \ /       2       x       \
  /       2   \     x    3      2*\1 + tan (x) + 4 *log(4)/         2    /       2   \   3*\4 *log (4) + 2*\1 + tan (x)/*tan(x)/*\1 + tan (x) + 4 *log(4)/
2*\1 + tan (x)/  + 4 *log (4) + ---------------------------- + 4*tan (x)*\1 + tan (x)/ - -----------------------------------------------------------------
                                                    2                                                                x                                    
                                       / x         \                                                                4  + tan(x)                           
                                       \4  + tan(x)/                                                                                                      
----------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        x                                                                                 
                                                                       4  + tan(x)                                                                        
4xlog(4)3+2(tan2(x)+1)2+4(tan2(x)+1)tan2(x)3(4xlog(4)2+2(tan2(x)+1)tan(x))(4xlog(4)+tan2(x)+1)4x+tan(x)+2(4xlog(4)+tan2(x)+1)3(4x+tan(x))24x+tan(x)\frac{4^{x} \log{\left(4 \right)}^{3} + 2 \left(\tan^{2}{\left(x \right)} + 1\right)^{2} + 4 \left(\tan^{2}{\left(x \right)} + 1\right) \tan^{2}{\left(x \right)} - \frac{3 \left(4^{x} \log{\left(4 \right)}^{2} + 2 \left(\tan^{2}{\left(x \right)} + 1\right) \tan{\left(x \right)}\right) \left(4^{x} \log{\left(4 \right)} + \tan^{2}{\left(x \right)} + 1\right)}{4^{x} + \tan{\left(x \right)}} + \frac{2 \left(4^{x} \log{\left(4 \right)} + \tan^{2}{\left(x \right)} + 1\right)^{3}}{\left(4^{x} + \tan{\left(x \right)}\right)^{2}}}{4^{x} + \tan{\left(x \right)}}
Gráfico
Derivada de y=ln(4^x+tgx)