Sr Examen

Derivada de y=e^x/lnx

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

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Definida a trozos:

Solución

Ha introducido [src]
   x  
  E   
------
log(x)
exlog(x)\frac{e^{x}}{\log{\left(x \right)}}
E^x/log(x)
Solución detallada
  1. 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)=exf{\left(x \right)} = e^{x} y g(x)=log(x)g{\left(x \right)} = \log{\left(x \right)}.

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

    1. Derivado exe^{x} es.

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

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

    Ahora aplicamos la regla de la derivada de una divesión:

    exlog(x)exxlog(x)2\frac{e^{x} \log{\left(x \right)} - \frac{e^{x}}{x}}{\log{\left(x \right)}^{2}}

  2. Simplificamos:

    (xlog(x)1)exxlog(x)2\frac{\left(x \log{\left(x \right)} - 1\right) e^{x}}{x \log{\left(x \right)}^{2}}


Respuesta:

(xlog(x)1)exxlog(x)2\frac{\left(x \log{\left(x \right)} - 1\right) e^{x}}{x \log{\left(x \right)}^{2}}

Gráfica
02468-8-6-4-2-1010-1000010000
Primera derivada [src]
   x          x   
  e          e    
------ - ---------
log(x)        2   
         x*log (x)
exlog(x)exxlog(x)2\frac{e^{x}}{\log{\left(x \right)}} - \frac{e^{x}}{x \log{\left(x \right)}^{2}}
Segunda derivada [src]
/                     2   \   
|               1 + ------|   
|       2           log(x)|  x
|1 - -------- + ----------|*e 
|    x*log(x)    2        |   
\               x *log(x) /   
------------------------------
            log(x)            
(12xlog(x)+1+2log(x)x2log(x))exlog(x)\frac{\left(1 - \frac{2}{x \log{\left(x \right)}} + \frac{1 + \frac{2}{\log{\left(x \right)}}}{x^{2} \log{\left(x \right)}}\right) e^{x}}{\log{\left(x \right)}}
Tercera derivada [src]
/                 /      3         3   \                 \   
|               2*|1 + ------ + -------|     /      2   \|   
|                 |    log(x)      2   |   3*|1 + ------||   
|       3         \             log (x)/     \    log(x)/|  x
|1 - -------- - ------------------------ + --------------|*e 
|    x*log(x)           3                     2          |   
\                      x *log(x)             x *log(x)   /   
-------------------------------------------------------------
                            log(x)                           
(13xlog(x)+3(1+2log(x))x2log(x)2(1+3log(x)+3log(x)2)x3log(x))exlog(x)\frac{\left(1 - \frac{3}{x \log{\left(x \right)}} + \frac{3 \left(1 + \frac{2}{\log{\left(x \right)}}\right)}{x^{2} \log{\left(x \right)}} - \frac{2 \left(1 + \frac{3}{\log{\left(x \right)}} + \frac{3}{\log{\left(x \right)}^{2}}\right)}{x^{3} \log{\left(x \right)}}\right) e^{x}}{\log{\left(x \right)}}
Gráfico
Derivada de y=e^x/lnx