Sr Examen

Derivada de (x+tgx)5^x

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

Ha introducido [src]
              x
(x + tan(x))*5 
5x(x+tan(x))5^{x} \left(x + \tan{\left(x \right)}\right)
(x + tan(x))*5^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)=x+tan(x)f{\left(x \right)} = x + \tan{\left(x \right)}; calculamos ddxf(x)\frac{d}{d x} f{\left(x \right)}:

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

      1. Según el principio, aplicamos: xx tenemos 11

      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: sin2(x)+cos2(x)cos2(x)+1\frac{\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}}{\cos^{2}{\left(x \right)}} + 1

    g(x)=5xg{\left(x \right)} = 5^{x}; calculamos ddxg(x)\frac{d}{d x} g{\left(x \right)}:

    1. ddx5x=5xlog(5)\frac{d}{d x} 5^{x} = 5^{x} \log{\left(5 \right)}

    Como resultado de: 5x(x+tan(x))log(5)+5x(sin2(x)+cos2(x)cos2(x)+1)5^{x} \left(x + \tan{\left(x \right)}\right) \log{\left(5 \right)} + 5^{x} \left(\frac{\sin^{2}{\left(x \right)} + \cos^{2}{\left(x \right)}}{\cos^{2}{\left(x \right)}} + 1\right)

  2. Simplificamos:

    5x(log(5xcos(2x)+x+sin(2x))+cos(2x)+3)2cos2(x)\frac{5^{x} \left(\log{\left(5^{x \cos{\left(2 x \right)} + x + \sin{\left(2 x \right)}} \right)} + \cos{\left(2 x \right)} + 3\right)}{2 \cos^{2}{\left(x \right)}}


Respuesta:

5x(log(5xcos(2x)+x+sin(2x))+cos(2x)+3)2cos2(x)\frac{5^{x} \left(\log{\left(5^{x \cos{\left(2 x \right)} + x + \sin{\left(2 x \right)}} \right)} + \cos{\left(2 x \right)} + 3\right)}{2 \cos^{2}{\left(x \right)}}

Gráfica
02468-8-6-4-2-1010-200000000200000000
Primera derivada [src]
 x /       2   \    x                    
5 *\2 + tan (x)/ + 5 *(x + tan(x))*log(5)
5x(x+tan(x))log(5)+5x(tan2(x)+2)5^{x} \left(x + \tan{\left(x \right)}\right) \log{\left(5 \right)} + 5^{x} \left(\tan^{2}{\left(x \right)} + 2\right)
Segunda derivada [src]
 x /   2                     /       2   \            /       2   \       \
5 *\log (5)*(x + tan(x)) + 2*\1 + tan (x)/*tan(x) + 2*\2 + tan (x)/*log(5)/
5x((x+tan(x))log(5)2+2(tan2(x)+1)tan(x)+2(tan2(x)+2)log(5))5^{x} \left(\left(x + \tan{\left(x \right)}\right) \log{\left(5 \right)}^{2} + 2 \left(\tan^{2}{\left(x \right)} + 1\right) \tan{\left(x \right)} + 2 \left(\tan^{2}{\left(x \right)} + 2\right) \log{\left(5 \right)}\right)
Tercera derivada [src]
 x /   3                     /       2   \ /         2   \        2    /       2   \     /       2   \              \
5 *\log (5)*(x + tan(x)) + 2*\1 + tan (x)/*\1 + 3*tan (x)/ + 3*log (5)*\2 + tan (x)/ + 6*\1 + tan (x)/*log(5)*tan(x)/
5x((x+tan(x))log(5)3+2(tan2(x)+1)(3tan2(x)+1)+6(tan2(x)+1)log(5)tan(x)+3(tan2(x)+2)log(5)2)5^{x} \left(\left(x + \tan{\left(x \right)}\right) \log{\left(5 \right)}^{3} + 2 \left(\tan^{2}{\left(x \right)} + 1\right) \left(3 \tan^{2}{\left(x \right)} + 1\right) + 6 \left(\tan^{2}{\left(x \right)} + 1\right) \log{\left(5 \right)} \tan{\left(x \right)} + 3 \left(\tan^{2}{\left(x \right)} + 2\right) \log{\left(5 \right)}^{2}\right)
Gráfico
Derivada de (x+tgx)5^x