Which correctly describes the point of discontinuity of the function?

A real-valued univariate function f=f(x) has a jump discontinuity at a point in its domain provided that

and

both exist and that

As you can see at x=-3,

and

Therefore, there is a jump discontinuity at x=-3.

correct choice is A.

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation:

it should be a and d. lmk if i'm wrong xd