My answer agrees with the solution manual, but shouldn't $L(f,P)≤U(f,P)$? Did I do something wrong?
2026-03-31 17:59:06.1774979946
Let $f(x)=1/x$ on $[1, 3]$. Find $L(f,P)$ and $U(f,P)$ when $P=\{1, 2, 3\}$
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