Question

find f^-1(x)=, when f(x)={(3,5),(2,4),(1,7)}.

Answer 1

I think you just swap the Xs and Ys but I am not sure.

Answer 2

Yes, switch the x's and the y's. For example (3,5) will become (5,3).

Answer 3

bu what about the f with negative 1. what does that mean?

Answer 4

\(f^{-1}(x)\) means INVERSE of the function \(f(x)\).
In \(y = f(x)\), we put in x values and find the corresponding y.
With \(f^{-1}(x)\), we put in y values and find the corresponding x.

Answer 5

so f(5)=3, f(4)=2, f(7)=1and do you just add them or leave them like that.