Solución detallada
Tenemos la ecuación:
$$16^{x - 9} = \frac{1}{2}$$
o
$$16^{x - 9} - \frac{1}{2} = 0$$
o
$$\frac{16^{x}}{68719476736} = \frac{1}{2}$$
o
$$16^{x} = 34359738368$$
- es la ecuación exponencial más simple
Sustituimos
$$v = 16^{x}$$
obtendremos
$$v - 34359738368 = 0$$
o
$$v - 34359738368 = 0$$
Transportamos los términos libres (sin v)
del miembro izquierdo al derecho, obtenemos:
$$v = 34359738368$$
Obtenemos la respuesta: v = 34359738368
hacemos cambio inverso
$$16^{x} = v$$
o
$$x = \frac{\log{\left(v \right)}}{\log{\left(16 \right)}}$$
Entonces la respuesta definitiva es
$$x_{1} = \frac{\log{\left(34359738368 \right)}}{\log{\left(16 \right)}} = \frac{35}{4}$$
$$x_{1} = \frac{35}{4}$$
log(34359738368) pi*I
x2 = ---------------- - --------
4*log(2) 2*log(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)
$$x_{3} = \frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} + \frac{i \pi}{2 \log{\left(2 \right)}}$$
35 pi*I
x4 = -- + ------
4 log(2)
$$x_{4} = \frac{35}{4} + \frac{i \pi}{\log{\left(2 \right)}}$$
Suma y producto de raíces
[src]
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)
$$\left(\left(\frac{35}{4} + \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} - \frac{i \pi}{2 \log{\left(2 \right)}}\right)\right) + \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} + \frac{i \pi}{2 \log{\left(2 \right)}}\right)\right) + \left(\frac{35}{4} + \frac{i \pi}{\log{\left(2 \right)}}\right)$$
35 log(34359738368) pi*I
-- + ---------------- + ------
2 2*log(2) log(2)
$$\frac{35}{2} + \frac{\log{\left(34359738368 \right)}}{2 \log{\left(2 \right)}} + \frac{i \pi}{\log{\left(2 \right)}}$$
/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)/
$$\frac{35 \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} - \frac{i \pi}{2 \log{\left(2 \right)}}\right)}{4} \left(\frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} + \frac{i \pi}{2 \log{\left(2 \right)}}\right) \left(\frac{35}{4} + \frac{i \pi}{\log{\left(2 \right)}}\right)$$
35*(-2*pi*I + log(34359738368))*(2*pi*I + log(34359738368))*(4*pi*I + log(34359738368))
---------------------------------------------------------------------------------------
3
256*log (2)
$$\frac{35 \left(\log{\left(34359738368 \right)} - 2 i \pi\right) \left(\log{\left(34359738368 \right)} + 2 i \pi\right) \left(\log{\left(34359738368 \right)} + 4 i \pi\right)}{256 \log{\left(2 \right)}^{3}}$$
35*(-2*pi*i + log(34359738368))*(2*pi*i + log(34359738368))*(4*pi*i + log(34359738368))/(256*log(2)^3)