grandes-ecoles 2021 Q19

grandes-ecoles · France · centrale-maths2__official Not Maths

Can there be equality in the preceding inequality? $$\left\|P'\right\|_{L^\infty([-1,1])} \leqslant n^2 \|P\|_{L^\infty([-1,1])}$$

Can there be equality in the preceding inequality?
$$\left\|P'\right\|_{L^\infty([-1,1])} \leqslant n^2 \|P\|_{L^\infty([-1,1])}$$