16^(x-9)=1/2 la ecuación
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Solución
Solución detallada
Tenemos la ecuación:
1 6 x − 9 = 1 2 16^{x - 9} = \frac{1}{2} 1 6 x − 9 = 2 1 o
1 6 x − 9 − 1 2 = 0 16^{x - 9} - \frac{1}{2} = 0 1 6 x − 9 − 2 1 = 0 o
1 6 x 68719476736 = 1 2 \frac{16^{x}}{68719476736} = \frac{1}{2} 68719476736 1 6 x = 2 1 o
1 6 x = 34359738368 16^{x} = 34359738368 1 6 x = 34359738368 - es la ecuación exponencial más simple
Sustituimos
v = 1 6 x v = 16^{x} v = 1 6 x obtendremos
v − 34359738368 = 0 v - 34359738368 = 0 v − 34359738368 = 0 o
v − 34359738368 = 0 v - 34359738368 = 0 v − 34359738368 = 0 Transportamos los términos libres (sin v)
del miembro izquierdo al derecho, obtenemos:
v = 34359738368 v = 34359738368 v = 34359738368 Obtenemos la respuesta: v = 34359738368
hacemos cambio inverso
1 6 x = v 16^{x} = v 1 6 x = v o
x = log ( v ) log ( 16 ) x = \frac{\log{\left(v \right)}}{\log{\left(16 \right)}} x = log ( 16 ) log ( v ) Entonces la respuesta definitiva es
x 1 = log ( 34359738368 ) log ( 16 ) = 35 4 x_{1} = \frac{\log{\left(34359738368 \right)}}{\log{\left(16 \right)}} = \frac{35}{4} x 1 = log ( 16 ) log ( 34359738368 ) = 4 35
Gráfica
0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 27.5 0 1000000000000
x 1 = 35 4 x_{1} = \frac{35}{4} x 1 = 4 35
log(34359738368) pi*I
x2 = ---------------- - --------
4*log(2) 2*log(2)
x 2 = log ( 34359738368 ) 4 log ( 2 ) − i π 2 log ( 2 ) x_{2} = \frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} - \frac{i \pi}{2 \log{\left(2 \right)}} x 2 = 4 log ( 2 ) log ( 34359738368 ) − 2 log ( 2 ) iπ
log(34359738368) pi*I
x3 = ---------------- + --------
4*log(2) 2*log(2)
x 3 = log ( 34359738368 ) 4 log ( 2 ) + i π 2 log ( 2 ) x_{3} = \frac{\log{\left(34359738368 \right)}}{4 \log{\left(2 \right)}} + \frac{i \pi}{2 \log{\left(2 \right)}} x 3 = 4 log ( 2 ) log ( 34359738368 ) + 2 log ( 2 ) iπ
35 pi*I
x4 = -- + ------
4 log(2)
x 4 = 35 4 + i π log ( 2 ) x_{4} = \frac{35}{4} + \frac{i \pi}{\log{\left(2 \right)}} x 4 = 4 35 + log ( 2 ) iπ
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)
( ( 35 4 + ( log ( 34359738368 ) 4 log ( 2 ) − i π 2 log ( 2 ) ) ) + ( log ( 34359738368 ) 4 log ( 2 ) + i π 2 log ( 2 ) ) ) + ( 35 4 + i π 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) ( ( 4 35 + ( 4 log ( 2 ) log ( 34359738368 ) − 2 log ( 2 ) iπ ) ) + ( 4 log ( 2 ) log ( 34359738368 ) + 2 log ( 2 ) iπ ) ) + ( 4 35 + log ( 2 ) iπ )
35 log(34359738368) pi*I
-- + ---------------- + ------
2 2*log(2) log(2)
35 2 + log ( 34359738368 ) 2 log ( 2 ) + i π log ( 2 ) \frac{35}{2} + \frac{\log{\left(34359738368 \right)}}{2 \log{\left(2 \right)}} + \frac{i \pi}{\log{\left(2 \right)}} 2 35 + 2 log ( 2 ) log ( 34359738368 ) + log ( 2 ) iπ
/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 ) 4 log ( 2 ) − i π 2 log ( 2 ) ) 4 ( log ( 34359738368 ) 4 log ( 2 ) + i π 2 log ( 2 ) ) ( 35 4 + i π 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) 4 35 ( 4 l o g ( 2 ) l o g ( 34359738368 ) − 2 l o g ( 2 ) iπ ) ( 4 log ( 2 ) log ( 34359738368 ) + 2 log ( 2 ) iπ ) ( 4 35 + log ( 2 ) iπ )
35*(-2*pi*I + log(34359738368))*(2*pi*I + log(34359738368))*(4*pi*I + log(34359738368))
---------------------------------------------------------------------------------------
3
256*log (2)
35 ( log ( 34359738368 ) − 2 i π ) ( log ( 34359738368 ) + 2 i π ) ( log ( 34359738368 ) + 4 i π ) 256 log ( 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}} 256 log ( 2 ) 3 35 ( log ( 34359738368 ) − 2 iπ ) ( log ( 34359738368 ) + 2 iπ ) ( log ( 34359738368 ) + 4 iπ )
35*(-2*pi*i + log(34359738368))*(2*pi*i + log(34359738368))*(4*pi*i + log(34359738368))/(256*log(2)^3)
x2 = 8.75 - 2.2661800709136*i
x3 = 8.75 + 2.2661800709136*i
x4 = 8.75 + 4.53236014182719*i
x4 = 8.75 + 4.53236014182719*i