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{\frac{\left(2 + \frac{\sqrt{2}}{\sqrt{x}}\right) \left(\left(2 + \frac{\sqrt{2} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \operatorname{sign}{\left(x \right)}}{\sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}}}\right) \left(x + \sqrt{2} \sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} + 1\right) + 2 \sin^{2}{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \operatorname{sign}{\left(x \right)}\right) \operatorname{sign}{\left(\sqrt{2} \sqrt{x} + x + 1 \right)}}{\left(\sqrt{2} \sqrt{x} + x + 1\right)^{2} \left|{\sqrt{2} \sqrt{x} + x + 1}\right|} + \frac{\left(\left(2 + \frac{\sqrt{2} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \operatorname{sign}{\left(x \right)}}{\sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}}}\right) \left(x + \sqrt{2} \sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} + 1\right) + 2 \sin^{2}{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \operatorname{sign}{\left(x \right)}\right)^{2} \operatorname{sign}^{2}{\left(\sqrt{2} \sqrt{x} + x + 1 \right)}}{\left(\sqrt{2} \sqrt{x} + x + 1\right)^{2} \left|{\sqrt{2} \sqrt{x} + x + 1}\right|^{2}} - \frac{2 \left(\left(2 + \frac{\sqrt{2} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \operatorname{sign}{\left(x \right)}}{\sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}}}\right) \left(x + \sqrt{2} \sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} + 1\right) + 2 \sin^{2}{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \operatorname{sign}{\left(x \right)}\right) \frac{d}{d x} \operatorname{sign}{\left(\sqrt{2} \sqrt{x} + x + 1 \right)}}{\left(\sqrt{2} \sqrt{x} + x + 1\right) \left|{\sqrt{2} \sqrt{x} + x + 1}\right|} - \frac{\left(\left(2 + \frac{\sqrt{2} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \operatorname{sign}{\left(x \right)}}{\sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}}}\right) \left(2 - \frac{\sqrt{2} \sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}} \left(\frac{2 x \delta\left(x\right)}{\operatorname{sign}{\left(x \right)}} - 1\right) \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)}}{x}\right) + 8 \sin^{2}{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} \delta\left(x\right) + \frac{\sqrt{2} \left(4 \delta\left(x\right) + \frac{\left(\frac{2 x \delta\left(x\right)}{\operatorname{sign}{\left(x \right)}} - 1\right) \operatorname{sign}{\left(x \right)}}{x}\right) \left(x + \sqrt{2} \sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)} + 1\right) \cos{\left(\frac{\operatorname{atan_{2}}{\left(0,2 x \right)}}{2} \right)}}{\sqrt{\frac{x}{\operatorname{sign}{\left(x \right)}}}}\right) \operatorname{sign}{\left(\sqrt{2} \sqrt{x} + x + 1 \right)}}{\left(\sqrt{2} \sqrt{x} + x + 1\right) \left|{\sqrt{2} \sqrt{x} + x + 1}\right|} - \frac{\sqrt{2}}{x^{\frac{3}{2}}}}{4} = 0$$
Resolvermos esta ecuaciónSoluciones no halladas,
tal vez la función no tenga flexiones