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Límite de la función 4^(-3+x)*log(1-sin(2*x/3))/((-tan(x/4)+tan(3*x/4))*log(4))

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Gráfico:

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Solución

Ha introducido [src]
     /  -3 + x    /       /2*x\\  \
     | 4      *log|1 - sin|---||  |
     |            \       \ 3 //  |
 lim |----------------------------|
x->1+|/     /x\      /3*x\\       |
     ||- tan|-| + tan|---||*log(4)|
     \\     \4/      \ 4 //       /
$$\lim_{x \to 1^+}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right)$$
Limit((4^(-3 + x)*log(1 - sin((2*x)/3)))/(((-tan(x/4) + tan((3*x)/4))*log(4))), x, 1)
Método de l'Hopital
En el caso de esta función, no tiene sentido aplicar el Método de l'Hopital, ya que no existe la indeterminación tipo 0/0 or oo/oo
Gráfica
A la izquierda y a la derecha [src]
     /  -3 + x    /       /2*x\\  \
     | 4      *log|1 - sin|---||  |
     |            \       \ 3 //  |
 lim |----------------------------|
x->1+|/     /x\      /3*x\\       |
     ||- tan|-| + tan|---||*log(4)|
     \\     \4/      \ 4 //       /
$$\lim_{x \to 1^+}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right)$$
          -log(1 - sin(2/3))            
----------------------------------------
-32*log(2)*tan(3/4) + 32*log(2)*tan(1/4)
$$- \frac{\log{\left(1 - \sin{\left(\frac{2}{3} \right)} \right)}}{- 32 \log{\left(2 \right)} \tan{\left(\frac{3}{4} \right)} + 32 \log{\left(2 \right)} \tan{\left(\frac{1}{4} \right)}}$$
= -0.0642210460585065
     /  -3 + x    /       /2*x\\  \
     | 4      *log|1 - sin|---||  |
     |            \       \ 3 //  |
 lim |----------------------------|
x->1-|/     /x\      /3*x\\       |
     ||- tan|-| + tan|---||*log(4)|
     \\     \4/      \ 4 //       /
$$\lim_{x \to 1^-}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right)$$
          -log(1 - sin(2/3))            
----------------------------------------
-32*log(2)*tan(3/4) + 32*log(2)*tan(1/4)
$$- \frac{\log{\left(1 - \sin{\left(\frac{2}{3} \right)} \right)}}{- 32 \log{\left(2 \right)} \tan{\left(\frac{3}{4} \right)} + 32 \log{\left(2 \right)} \tan{\left(\frac{1}{4} \right)}}$$
= -0.0642210460585065
= -0.0642210460585065
Respuesta rápida [src]
          -log(1 - sin(2/3))            
----------------------------------------
-32*log(2)*tan(3/4) + 32*log(2)*tan(1/4)
$$- \frac{\log{\left(1 - \sin{\left(\frac{2}{3} \right)} \right)}}{- 32 \log{\left(2 \right)} \tan{\left(\frac{3}{4} \right)} + 32 \log{\left(2 \right)} \tan{\left(\frac{1}{4} \right)}}$$
Otros límites con x→0, -oo, +oo, 1
$$\lim_{x \to 1^-}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{\log{\left(1 - \sin{\left(\frac{2}{3} \right)} \right)}}{- 32 \log{\left(2 \right)} \tan{\left(\frac{3}{4} \right)} + 32 \log{\left(2 \right)} \tan{\left(\frac{1}{4} \right)}}$$
Más detalles con x→1 a la izquierda
$$\lim_{x \to 1^+}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{\log{\left(1 - \sin{\left(\frac{2}{3} \right)} \right)}}{- 32 \log{\left(2 \right)} \tan{\left(\frac{3}{4} \right)} + 32 \log{\left(2 \right)} \tan{\left(\frac{1}{4} \right)}}$$
$$\lim_{x \to \infty}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right)$$
Más detalles con x→oo
$$\lim_{x \to 0^-}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{1}{96 \log{\left(2 \right)}}$$
Más detalles con x→0 a la izquierda
$$\lim_{x \to 0^+}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = - \frac{1}{96 \log{\left(2 \right)}}$$
Más detalles con x→0 a la derecha
$$\lim_{x \to -\infty}\left(\frac{4^{x - 3} \log{\left(1 - \sin{\left(\frac{2 x}{3} \right)} \right)}}{\left(- \tan{\left(\frac{x}{4} \right)} + \tan{\left(\frac{3 x}{4} \right)}\right) \log{\left(4 \right)}}\right) = 0$$
Más detalles con x→-oo
Respuesta numérica [src]
-0.0642210460585065
-0.0642210460585065