calculate-if-there-are-maxims-and-minimus-of-the-following-function-y-x-2-1-if-x-1-x-4-if-x-1-

Question Number 67382 by Mikael last updated on 26/Aug/19

$${calculate}\:{if}\:{there}\:{are}\:{maxims}\:{and}\:{minimus}\:{of} \\ $$$${the}\:{following}\:{function}: \\ $$$${y}=\begin{cases}{{x}^{\mathrm{2}} +\mathrm{1}\:{if}\:{x}\lneq\mathrm{1}}\\{−{x}+\mathrm{4}\:{if}\:{x}\geqslant\mathrm{1}}\end{cases} \\ $$

Commented by mr W last updated on 26/Aug/19