kunallonare9019 kunallonare9019 10-05-2024 Math Answered Find all functions $f\colon\mathbb{r}\to\mathbb{r}$ such that $(x-y)\bigl(f(x) f(y)\bigr)\leqslant f\bigl(x^2-y^2\bigr)$ for all $x,y\in\mathbb{r}$.