Question Number 25940 by rita1608 last updated on 16/Dec/17
$${every}\:{extreme}\:{point}\:{is}\:{a}\:{critical}\: \\ $$$${point}\:{but}\:{every}\:{critical}\:{is}\:{not}\:{a}\: \\ $$$${extreme}\:{point}\:{justify}\:{it}\: \\ $$
every-extreme-point-is-a-critical-point-but-every-critical-is-not-a-extreme-point-justify-it-