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log(4^x-b,2)=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
   / x    \    
log\4  - b/    
----------- = 0
   log(2)      
$$\frac{\log{\left(4^{x} - b \right)}}{\log{\left(2 \right)}} = 0$$
Gráfica
Respuesta rápida [src]
        /|  _______|\        /   _______\
     log\|\/ 1 + b |/   I*arg\-\/ 1 + b /
x1 = ---------------- + -----------------
          log(2)              log(2)     
$$x_{1} = \frac{\log{\left(\left|{\sqrt{b + 1}}\right| \right)}}{\log{\left(2 \right)}} + \frac{i \arg{\left(- \sqrt{b + 1} \right)}}{\log{\left(2 \right)}}$$
     log(|1 + b|)   I*arg(1 + b)
x2 = ------------ + ------------
       2*log(2)       2*log(2)  
$$x_{2} = \frac{\log{\left(\left|{b + 1}\right| \right)}}{2 \log{\left(2 \right)}} + \frac{i \arg{\left(b + 1 \right)}}{2 \log{\left(2 \right)}}$$
x2 = log(|b + 1|)/(2*log(2)) + i*arg(b + 1)/(2*log(2))
Suma y producto de raíces [src]
suma
   /|  _______|\        /   _______\                              
log\|\/ 1 + b |/   I*arg\-\/ 1 + b /   log(|1 + b|)   I*arg(1 + b)
---------------- + ----------------- + ------------ + ------------
     log(2)              log(2)          2*log(2)       2*log(2)  
$$\left(\frac{\log{\left(\left|{\sqrt{b + 1}}\right| \right)}}{\log{\left(2 \right)}} + \frac{i \arg{\left(- \sqrt{b + 1} \right)}}{\log{\left(2 \right)}}\right) + \left(\frac{\log{\left(\left|{b + 1}\right| \right)}}{2 \log{\left(2 \right)}} + \frac{i \arg{\left(b + 1 \right)}}{2 \log{\left(2 \right)}}\right)$$
=
   /|  _______|\                       /   _______\               
log\|\/ 1 + b |/   log(|1 + b|)   I*arg\-\/ 1 + b /   I*arg(1 + b)
---------------- + ------------ + ----------------- + ------------
     log(2)          2*log(2)           log(2)          2*log(2)  
$$\frac{\log{\left(\left|{\sqrt{b + 1}}\right| \right)}}{\log{\left(2 \right)}} + \frac{\log{\left(\left|{b + 1}\right| \right)}}{2 \log{\left(2 \right)}} + \frac{i \arg{\left(- \sqrt{b + 1} \right)}}{\log{\left(2 \right)}} + \frac{i \arg{\left(b + 1 \right)}}{2 \log{\left(2 \right)}}$$
producto
/   /|  _______|\        /   _______\\                              
|log\|\/ 1 + b |/   I*arg\-\/ 1 + b /| /log(|1 + b|)   I*arg(1 + b)\
|---------------- + -----------------|*|------------ + ------------|
\     log(2)              log(2)     / \  2*log(2)       2*log(2)  /
$$\left(\frac{\log{\left(\left|{\sqrt{b + 1}}\right| \right)}}{\log{\left(2 \right)}} + \frac{i \arg{\left(- \sqrt{b + 1} \right)}}{\log{\left(2 \right)}}\right) \left(\frac{\log{\left(\left|{b + 1}\right| \right)}}{2 \log{\left(2 \right)}} + \frac{i \arg{\left(b + 1 \right)}}{2 \log{\left(2 \right)}}\right)$$
=
/     /   _______\      /|  _______|\\                              
\I*arg\-\/ 1 + b / + log\|\/ 1 + b |//*(I*arg(1 + b) + log(|1 + b|))
--------------------------------------------------------------------
                                  2                                 
                             2*log (2)                              
$$\frac{\left(\log{\left(\left|{\sqrt{b + 1}}\right| \right)} + i \arg{\left(- \sqrt{b + 1} \right)}\right) \left(\log{\left(\left|{b + 1}\right| \right)} + i \arg{\left(b + 1 \right)}\right)}{2 \log{\left(2 \right)}^{2}}$$
(i*arg(-sqrt(1 + b)) + log(Abs(sqrt(1 + b))))*(i*arg(1 + b) + log(|1 + b|))/(2*log(2)^2)