Question Number 64213 by Tony Lin last updated on 15/Jul/19
$$\int\frac{\mathrm{1}}{{x}!}{dx}=? \\ $$
Commented by MJS last updated on 15/Jul/19
$$\frac{\mathrm{1}}{{x}!}\:\mathrm{is}\:\mathrm{defined}\:\mathrm{for}\:{x}\in\mathbb{N}\:\Rightarrow\:\mathrm{it}'\mathrm{s}\:\mathrm{not}\:\mathrm{continuous} \\ $$$$\mathrm{for}\:{x}\in\mathbb{R}\:\Rightarrow\:\mathrm{it}'\mathrm{s}\:\mathrm{not}\:\mathrm{integrable} \\ $$
Commented by Tony Lin last updated on 16/Jul/19
$${thanks}\:{sir} \\ $$