The is the definition of this is a real word

The Oxford English Dictionary lists as “a factitious word alleged to mean 'a lung disease caused by inhalation of very fine silica dust usually found in volcanos' but occurring chiefly as an instance of a very long word”.

Explanation:

no its not

Explanation:hey

when x = 3 , f(x)=10 which is not defined. If you keep any other values except 3, your function is valid. So, the domain is all values of the real line except 3.

Step-by-step explanation:

I hope this is correct