I solved a task and wanted to ask whether I did the task correctly.
Put $\Rightarrow$, $\Leftarrow$, $\iff$ in the box so that the logical statement is true.
What I did:
$$ \forall x\in\mathbb{N}:x>5 \iff \frac{1}{x} < \frac{1}{5} $$ $$ \forall x\in\mathbb{Z}:x>2 \Rightarrow \frac{1}{x} < \frac{1}{2} $$ $$ \forall p\in\mathbb{R}:|p|=1 \Rightarrow p \ge -1 $$ $$ \forall x\in\mathbb{Q}: x \ge 0 \Rightarrow x^4 \ge 0 $$
I just put a $\Rightarrow$, $\Leftarrow$ and $\iff$ between these inequalities, so only they have to be checked.
Thank you for your help!