Sr Examen

Derivada de √x/lnx

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

Gráfico:

interior superior

Definida a trozos:

Solución

Ha introducido [src]
  ___ 
\/ x  
------
log(x)
xlog(x)\frac{\sqrt{x}}{\log{\left(x \right)}}
sqrt(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)=xf{\left(x \right)} = \sqrt{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. Según el principio, aplicamos: x\sqrt{x} tenemos 12x\frac{1}{2 \sqrt{x}}

    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:

    log(x)2x1xlog(x)2\frac{\frac{\log{\left(x \right)}}{2 \sqrt{x}} - \frac{1}{\sqrt{x}}}{\log{\left(x \right)}^{2}}

  2. Simplificamos:

    log(x)22xlog(x)2\frac{\log{\left(x \right)} - 2}{2 \sqrt{x} \log{\left(x \right)}^{2}}


Respuesta:

log(x)22xlog(x)2\frac{\log{\left(x \right)} - 2}{2 \sqrt{x} \log{\left(x \right)}^{2}}

Gráfica
02468-8-6-4-2-1010-200100
Primera derivada [src]
      1                1      
-------------- - -------------
    ___            ___    2   
2*\/ x *log(x)   \/ x *log (x)
12xlog(x)1xlog(x)2\frac{1}{2 \sqrt{x} \log{\left(x \right)}} - \frac{1}{\sqrt{x} \log{\left(x \right)}^{2}}
Segunda derivada [src]
                     2   
               1 + ------
  1     1          log(x)
- - - ------ + ----------
  4   log(x)     log(x)  
-------------------------
        3/2              
       x   *log(x)       
1+2log(x)log(x)141log(x)x32log(x)\frac{\frac{1 + \frac{2}{\log{\left(x \right)}}}{\log{\left(x \right)}} - \frac{1}{4} - \frac{1}{\log{\left(x \right)}}}{x^{\frac{3}{2}} \log{\left(x \right)}}
Tercera derivada [src]
                 /      3         3   \                 
               2*|1 + ------ + -------|     /      2   \
                 |    log(x)      2   |   3*|1 + ------|
3      3         \             log (x)/     \    log(x)/
- + -------- - ------------------------ + --------------
8   4*log(x)            log(x)               2*log(x)   
--------------------------------------------------------
                       5/2                              
                      x   *log(x)                       
3(1+2log(x))2log(x)2(1+3log(x)+3log(x)2)log(x)+38+34log(x)x52log(x)\frac{\frac{3 \left(1 + \frac{2}{\log{\left(x \right)}}\right)}{2 \log{\left(x \right)}} - \frac{2 \left(1 + \frac{3}{\log{\left(x \right)}} + \frac{3}{\log{\left(x \right)}^{2}}\right)}{\log{\left(x \right)}} + \frac{3}{8} + \frac{3}{4 \log{\left(x \right)}}}{x^{\frac{5}{2}} \log{\left(x \right)}}
Gráfico
Derivada de √x/lnx