Question

inverse of the function y=3x^2, if x> or equal to 0

Answer 1

y=sqrt(x)/3

Answer 2

again swap x and y

x = 3y^2

x/3 = y^2

\[y = \sqrt{x/3}\]

there is a positive and negative root, only consider the positive because of the domain restriction given in the question

Answer 3

woops yea sqrt covers the whole thing