# Critical Point Finder

Here you choose the function $y= f(x)$ and the interval $[a,b]$, and this page finds and graphs the critical points $y'=0$ and inflection points $y''=0$ in this interval.

Advanced Usage: If the graph extends too far vertically, enter a cutoff ($\infty$ is entered as oo). If the interval is too big, some critical points may be missed.