exp(x/5)=49/69 la ecuación
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Solución
Solución detallada
Tenemos la ecuación:
e x 5 = 49 69 e^{\frac{x}{5}} = \frac{49}{69} e 5 x = 69 49 o
e x 5 − 49 69 = 0 e^{\frac{x}{5}} - \frac{49}{69} = 0 e 5 x − 69 49 = 0 o
e x 5 = 49 69 e^{\frac{x}{5}} = \frac{49}{69} e 5 x = 69 49 o
e x 5 = 49 69 e^{\frac{x}{5}} = \frac{49}{69} e 5 x = 69 49 - es la ecuación exponencial más simple
Sustituimos
v = e x 5 v = e^{\frac{x}{5}} v = e 5 x obtendremos
v − 49 69 = 0 v - \frac{49}{69} = 0 v − 69 49 = 0 o
v − 49 69 = 0 v - \frac{49}{69} = 0 v − 69 49 = 0 Transportamos los términos libres (sin v)
del miembro izquierdo al derecho, obtenemos:
v = 49 69 v = \frac{49}{69} v = 69 49 Obtenemos la respuesta: v = 49/69
hacemos cambio inverso
e x 5 = v e^{\frac{x}{5}} = v e 5 x = v o
x = 5 log ( v ) x = 5 \log{\left(v \right)} x = 5 log ( v ) Entonces la respuesta definitiva es
x 1 = log ( 49 69 ) log ( e 1 5 ) = log ( 282475249 1564031349 ) x_{1} = \frac{\log{\left(\frac{49}{69} \right)}}{\log{\left(e^{\frac{1}{5}} \right)}} = \log{\left(\frac{282475249}{1564031349} \right)} x 1 = log ( e 5 1 ) log ( 69 49 ) = log ( 1564031349 282475249 )
Gráfica
-17.5 -15.0 -12.5 -10.0 -7.5 -5.0 -2.5 0.0 2.5 5.0 7.5 10.0 0 10
/282475249 \
x1 = log|----------|
\1564031349/
x 1 = log ( 282475249 1564031349 ) x_{1} = \log{\left(\frac{282475249}{1564031349} \right)} x 1 = log ( 1564031349 282475249 )
x1 = log(282475249/1564031349)
Suma y producto de raíces
[src]
/282475249 \
log|----------|
\1564031349/
log ( 282475249 1564031349 ) \log{\left(\frac{282475249}{1564031349} \right)} log ( 1564031349 282475249 )
/282475249 \
log|----------|
\1564031349/
log ( 282475249 1564031349 ) \log{\left(\frac{282475249}{1564031349} \right)} log ( 1564031349 282475249 )
/282475249 \
log|----------|
\1564031349/
log ( 282475249 1564031349 ) \log{\left(\frac{282475249}{1564031349} \right)} log ( 1564031349 282475249 )
/282475249 \
log|----------|
\1564031349/
log ( 282475249 1564031349 ) \log{\left(\frac{282475249}{1564031349} \right)} log ( 1564031349 282475249 )
log(282475249/1564031349)