Question

What is the domain and range of `y=3x^2`?

Answer 1

Domain: `x in RR`
Range: `y in RR [0,+oo)`

Explanation:

`y=3x^2`
is defined for all Real values of `x`

`3x^2 >= 0 and rarr +oo` as `abs(x) rarr oo`