Prove that $|x|^ {−qp} \in L^{1}(U)$, where $U=B_{1}(0)\subset \mathbb{R}^{n}$. I think I could use polar coordinates to facilitate the work but not sure if it is useful.
2026-04-17 22:37:12.1776465432
What powers of $|x|$ belong to $L^1$?
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