Hallemos los puntos de flexiones, para eso hay que resolver la ecuación
$$\frac{d^{2}}{d x^{2}} f{\left(x \right)} = 0$$
(la segunda derivada es igual a cero),
las raíces de la ecuación obtenida serán los puntos de flexión para el gráfico de la función indicado:
$$\frac{d^{2}}{d x^{2}} f{\left(x \right)} = $$
segunda derivada$$\frac{\left(4 \left(\frac{\log{\left(\frac{x - 1}{\operatorname{sign}{\left(x - 1 \right)}} \right)}}{\log{\left(3 \right)}} + 2\right) \delta\left(x - 1\right) \operatorname{sign}{\left(\frac{\log{\left(x - 1 \right)}}{\log{\left(3 \right)}} + 2 \right)} + \left(\frac{\log{\left(\frac{x - 1}{\operatorname{sign}{\left(x - 1 \right)}} \right)}}{\log{\left(3 \right)}} + 2\right) \operatorname{sign}{\left(x - 1 \right)} \frac{d}{d x} \operatorname{sign}{\left(\frac{\log{\left(x - 1 \right)}}{\log{\left(3 \right)}} + 2 \right)} - \frac{\left(\frac{\log{\left(\frac{x - 1}{\operatorname{sign}{\left(x - 1 \right)}} \right)}}{\log{\left(3 \right)}} + 2\right) \operatorname{sign}{\left(x - 1 \right)} \operatorname{sign}{\left(\frac{\log{\left(x - 1 \right)}}{\log{\left(3 \right)}} + 2 \right)}}{x - 1} - \frac{\left(\frac{\log{\left(\frac{x - 1}{\operatorname{sign}{\left(x - 1 \right)}} \right)}}{\log{\left(3 \right)}} + 2\right) \operatorname{sign}{\left(x - 1 \right)} \operatorname{sign}{\left(\frac{\log{\left(x - 1 \right)}}{\log{\left(3 \right)}} + 2 \right)}}{\left(x - 1\right) \left(\frac{\log{\left(x - 1 \right)}}{\log{\left(3 \right)}} + 2\right) \log{\left(3 \right)}} - \frac{\left(\frac{2 \left(x - 1\right) \delta\left(x - 1\right)}{\operatorname{sign}{\left(x - 1 \right)}} - 1\right) \operatorname{sign}{\left(x - 1 \right)} \operatorname{sign}{\left(\frac{\log{\left(x - 1 \right)}}{\log{\left(3 \right)}} + 2 \right)}}{\left(x - 1\right) \log{\left(3 \right)}}\right) \operatorname{sign}{\left(x - 1 \right)}}{\left(x - 1\right) \left(\frac{\log{\left(x - 1 \right)}}{\log{\left(3 \right)}} + 2\right) \log{\left(3 \right)}} = 0$$
Resolvermos esta ecuaciónSoluciones no halladas,
tal vez la función no tenga flexiones