Question

What is the domain of f(x)=3x -²

Answer 1

\(\displaystyle 3x^{-2}\Longrightarrow \frac{3}{x^2}\) you know that right?

Answer 2

I am using the rule: \(\LARGE\displaystyle a^{-b}=\frac{1}{a^b}\)

and when I have a constant in front, such that:

\(\LARGE\displaystyle c(a)^{-b}=c\cdot \frac{1}{a^b}=\frac{c}{a^b}\)