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16^(x-9)=1/2

16^(x-9)=1/2 la ecuación

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v

Solución numérica:

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Solución

Ha introducido [src]
  x - 9      
16      = 1/2
16x9=1216^{x - 9} = \frac{1}{2}
Solución detallada
Tenemos la ecuación:
16x9=1216^{x - 9} = \frac{1}{2}
o
16x912=016^{x - 9} - \frac{1}{2} = 0
o
16x68719476736=12\frac{16^{x}}{68719476736} = \frac{1}{2}
o
16x=3435973836816^{x} = 34359738368
- es la ecuación exponencial más simple
Sustituimos
v=16xv = 16^{x}
obtendremos
v34359738368=0v - 34359738368 = 0
o
v34359738368=0v - 34359738368 = 0
Transportamos los términos libres (sin v)
del miembro izquierdo al derecho, obtenemos:
v=34359738368v = 34359738368
Obtenemos la respuesta: v = 34359738368
hacemos cambio inverso
16x=v16^{x} = v
o
x=log(v)log(16)x = \frac{\log{\left(v \right)}}{\log{\left(16 \right)}}
Entonces la respuesta definitiva es
x1=log(34359738368)log(16)=354x_{1} = \frac{\log{\left(34359738368 \right)}}{\log{\left(16 \right)}} = \frac{35}{4}
Gráfica
0.02.55.07.510.012.515.017.520.022.525.027.501000000000000
Respuesta rápida [src]
x1 = 35/4
x1=354x_{1} = \frac{35}{4}
     log(34359738368)     pi*I  
x2 = ---------------- - --------
         4*log(2)       2*log(2)
x2=log(34359738368)4log(2)iπ2log(2)x_{2} = \frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} - \frac{i \pi}{2 \log{\left(2 \right)}}
     log(34359738368)     pi*I  
x3 = ---------------- + --------
         4*log(2)       2*log(2)
x3=log(34359738368)4log(2)+iπ2log(2)x_{3} = \frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} + \frac{i \pi}{2 \log{\left(2 \right)}}
     35    pi*I 
x4 = -- + ------
     4    log(2)
x4=354+iπlog(2)x_{4} = \frac{35}{4} + \frac{i \pi}{\log{\left(2 \right)}}
x4 = 35/4 + i*pi/log(2)
Suma y producto de raíces [src]
suma
35   log(34359738368)     pi*I     log(34359738368)     pi*I     35    pi*I 
-- + ---------------- - -------- + ---------------- + -------- + -- + ------
4        4*log(2)       2*log(2)       4*log(2)       2*log(2)   4    log(2)
((354+(log(34359738368)4log(2)iπ2log(2)))+(log(34359738368)4log(2)+iπ2log(2)))+(354+iπlog(2))\left(\left(\frac{35}{4} + \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} - \frac{i \pi}{2 \log{\left(2 \right)}}\right)\right) + \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} + \frac{i \pi}{2 \log{\left(2 \right)}}\right)\right) + \left(\frac{35}{4} + \frac{i \pi}{\log{\left(2 \right)}}\right)
=
35   log(34359738368)    pi*I 
-- + ---------------- + ------
2        2*log(2)       log(2)
352+log(34359738368)2log(2)+iπlog(2)\frac{35}{2} + \frac{\log{\left(34359738368 \right)}}{2 \log{\left(2 \right)}} + \frac{i \pi}{\log{\left(2 \right)}}
producto
   /log(34359738368)     pi*I  \                                            
35*|---------------- - --------|                                            
   \    4*log(2)       2*log(2)/ /log(34359738368)     pi*I  \ /35    pi*I \
--------------------------------*|---------------- + --------|*|-- + ------|
               4                 \    4*log(2)       2*log(2)/ \4    log(2)/
35(log(34359738368)4log(2)iπ2log(2))4(log(34359738368)4log(2)+iπ2log(2))(354+iπlog(2))\frac{35 \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} - \frac{i \pi}{2 \log{\left(2 \right)}}\right)}{4} \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} + \frac{i \pi}{2 \log{\left(2 \right)}}\right) \left(\frac{35}{4} + \frac{i \pi}{\log{\left(2 \right)}}\right)
=
35*(-2*pi*I + log(34359738368))*(2*pi*I + log(34359738368))*(4*pi*I + log(34359738368))
---------------------------------------------------------------------------------------
                                             3                                         
                                      256*log (2)                                      
35(log(34359738368)2iπ)(log(34359738368)+2iπ)(log(34359738368)+4iπ)256log(2)3\frac{35 \left(\log{\left(34359738368 \right)} - 2 i \pi\right) \left(\log{\left(34359738368 \right)} + 2 i \pi\right) \left(\log{\left(34359738368 \right)} + 4 i \pi\right)}{256 \log{\left(2 \right)}^{3}}
35*(-2*pi*i + log(34359738368))*(2*pi*i + log(34359738368))*(4*pi*i + log(34359738368))/(256*log(2)^3)
Respuesta numérica [src]
x1 = 8.75
x2 = 8.75 - 2.2661800709136*i
x3 = 8.75 + 2.2661800709136*i
x4 = 8.75 + 4.53236014182719*i
x4 = 8.75 + 4.53236014182719*i
Gráfico
16^(x-9)=1/2 la ecuación