Укажите пары значений \(\displaystyle h\) и \(\displaystyle p{\small,}\) при которых выражение \(\displaystyle \frac{hp}{h-p}\) не имеет смысла.

• \(\displaystyle h=7{\small;}\) \(\displaystyle p=7\)
• \(\displaystyle h=2{\small;}\) \(\displaystyle p=2\)
• \(\displaystyle h=-2{\small;}\) \(\displaystyle p=2\)
• \(\displaystyle h=7{\small;}\) \(\displaystyle p=-7\)