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for questions involving inequalities, upper and lower bounds.
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a inequality of $L^p$ [closed]
I want to prove the inequality
$$
|x-y|^p \le \frac{p}{2}\big|x-y\big|\;\big(x^{p-1}+y^{p-1}\big)
$$
if $p \ge 1$. For the case $p$ is an integer, it's easy to do, but I have no idea when $p$ is not …