Use the given D to find the range of each function: f(x)=x2−4, D={−14.1, 0.04, 21.06}

Answer 1

y = x^2-4 ???
I guess you mean domain by D
then all that means is:
find:
(-14.1)(-14.1) - 4
(.04)(.04) - 4
(21.06)(21.06) - 4
since the domain is just those three values of x, the range is those three values of y

Answer 2

What do you mean

Answer 3

you want the range. That is the set of y-values
So, given a set of x-values (the domain D), compute x^2-4 for each one. The results are the range.

Answer 4

I tried that