Los 4^x-2^x=y op

$$4 ^ { x } - 2 ^ { x } = y$$

Oplossen voor x (complex solution)

$$\left\{\begin{matrix}\\x=\log_{2}\left(\frac{\sqrt{4y+1}+1}{2}\right)+\frac{2\pi n_{2}i}{\ln(2)}\text{, }n_{2}\in \mathrm{Z}\text{, }&\text{unconditionally}\\x=\log_{2}\left(\frac{-\sqrt{4y+1}+1}{2}\right)+\frac{2\pi n_{1}i}{\ln(2)}\text{, }n_{1}\in \mathrm{Z}\text{, }&y\neq 0\end{matrix}\right,$$

Oplossen voor y (complex solution)

$$y=4^{x}-2^{x}$$

Oplossen voor x

$$\left\{\begin{matrix}x=\log_{2}\left(\frac{\sqrt{4y+1}+1}{2}\right)\text{, }&y\geq -\frac{1}{4}\\x=\log_{2}\left(\frac{-\sqrt{4y+1}+1}{2}\right)\text{, }&y\geq -\frac{1}{4}\text{ and }y<0\end{matrix}\right,$$

Oplossen voor y

$$y=2^{x}\left(2^{x}-1\right)$$