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\begin{array}{rclll}\dfrac{49}{8} &=& \dfrac{1}{2} \cdot \left(\dfrac{7}{2}\right)^{2x} & \vert & \cdot 2\cr \dfrac{49}{4} &=& \left(\dfrac{7}{2}\right)^{2x} & \vert & \ln{()}\cr \ln{\left(\dfrac{49}{4}\right)} &=& \ln{\left(\left(\dfrac{7}{2}\right)^{2x}\right)}\cr \ln{\left(\left(\dfrac{7}{2}\right)^2\right)} &=& 2x \cdot \ln{\left(\dfrac{7}{2}\right)} \cr 2\ln{\left(\dfrac{7}{2}\right)} &=& 2x \cdot \ln{\left(\dfrac{7}{2}\right)} & \vert & : 2\ln \left(\dfrac{7}{2}\right)\cr x &=& 1 \in\mathbb{D} & & \rightarrow \quad P_2\left(1 \mid 6{,}125\right)\end{array}