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4^((x+19)/19)+4^(x/38)=68 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
 x + 19    x      
 ------    --     
   19      38     
4       + 4   = 68
4x+1919+4x38=684^{\frac{x + 19}{19}} + 4^{\frac{x}{38}} = 68
Solución detallada
Tenemos la ecuación:
4x+1919+4x38=684^{\frac{x + 19}{19}} + 4^{\frac{x}{38}} = 68
o
(4x+1919+4x38)68=0\left(4^{\frac{x + 19}{19}} + 4^{\frac{x}{38}}\right) - 68 = 0
Sustituimos
v=2x19v = 2^{\frac{x}{19}}
obtendremos
4x38+4x19+168=04^{\frac{x}{38}} + 4^{\frac{x}{19} + 1} - 68 = 0
o
4x38+4x19+168=04^{\frac{x}{38}} + 4^{\frac{x}{19} + 1} - 68 = 0
hacemos cambio inverso
2x19=v2^{\frac{x}{19}} = v
o
x=log(v)log(219)x = \frac{\log{\left(v \right)}}{\log{\left(\sqrt[19]{2} \right)}}
Entonces la respuesta definitiva es
x1=log(38)log(219)=log(3819log(2))x_{1} = \frac{\log{\left(38 \right)}}{\log{\left(\sqrt[19]{2} \right)}} = \log{\left(38^{\frac{19}{\log{\left(2 \right)}}} \right)}
x2=log(19(log(174)+iπ)log(2))log(219)=log(19(log(174)+iπ)log(2))log(219)x_{2} = \frac{\log{\left(\frac{19 \left(\log{\left(\frac{17}{4} \right)} + i \pi\right)}{\log{\left(2 \right)}} \right)}}{\log{\left(\sqrt[19]{2} \right)}} = \frac{\log{\left(\frac{19 \left(\log{\left(\frac{17}{4} \right)} + i \pi\right)}{\log{\left(2 \right)}} \right)}}{\log{\left(\sqrt[19]{2} \right)}}
Gráfica
3035404550556065700200
Suma y producto de raíces [src]
suma
     19*log(17/4)   19*pi*I
38 + ------------ + -------
        log(2)       log(2)
38+(19log(174)log(2)+19iπlog(2))38 + \left(\frac{19 \log{\left(\frac{17}{4} \right)}}{\log{\left(2 \right)}} + \frac{19 i \pi}{\log{\left(2 \right)}}\right)
=
     19*log(17/4)   19*pi*I
38 + ------------ + -------
        log(2)       log(2)
38+19log(174)log(2)+19iπlog(2)38 + \frac{19 \log{\left(\frac{17}{4} \right)}}{\log{\left(2 \right)}} + \frac{19 i \pi}{\log{\left(2 \right)}}
producto
   /19*log(17/4)   19*pi*I\
38*|------------ + -------|
   \   log(2)       log(2)/
38(19log(174)log(2)+19iπlog(2))38 \left(\frac{19 \log{\left(\frac{17}{4} \right)}}{\log{\left(2 \right)}} + \frac{19 i \pi}{\log{\left(2 \right)}}\right)
=
722*(pi*I + log(17/4))
----------------------
        log(2)        
722(log(174)+iπ)log(2)\frac{722 \left(\log{\left(\frac{17}{4} \right)} + i \pi\right)}{\log{\left(2 \right)}}
722*(pi*i + log(17/4))/log(2)
Respuesta rápida [src]
x1 = 38
x1=38x_{1} = 38
     19*log(17/4)   19*pi*I
x2 = ------------ + -------
        log(2)       log(2)
x2=19log(174)log(2)+19iπlog(2)x_{2} = \frac{19 \log{\left(\frac{17}{4} \right)}}{\log{\left(2 \right)}} + \frac{19 i \pi}{\log{\left(2 \right)}}
x2 = 19*log(17/4)/log(2) + 19*i*pi/log(2)
Respuesta numérica [src]
x1 = 38.0
x2 = 39.6617939837564 + 86.1148426947167*i
x2 = 39.6617939837564 + 86.1148426947167*i