Denote by $L^1(0,1)$ the space of Lebesgue integrable functions on the interval $(0,1)$. $\textbf{Question:}$ Does there exist a function $F:(0,1)\rightarrow\mathbb{R}$ such that: 1) $\frac{F(x)}{x}\in L^1(0,1)$, 2) $\frac{F'(x)}{x}\in L^1(0,1)$, 3) $\frac{F(x)}{x^2}\notin L^1(0,1)$? I'm guessing that the answer is positive and the point is to construct $F$ such that $F$ and $F'$ behave suitably near zero. It seems quite delicate. I checked that $F$ cannot be a polynomial or a power function (since then $F'\simeq \frac{F}x$, thus conditions 2 and 3 cannot hold simultaneously). I would appreciate any hints!