For the following two (02) items:
Consider the function  $f(x)=\frac{10^{x}-10^{-x}}{10^{x}+10^{-x}}$

What is the inverse of the function?

Consider the following for the two (02) items that follow:

Let the function y = (1 - cos x)^-1 where$x \ne 2n\pi$ and n is an integer

What is the range of the function?

Consider the following for the two (02) items that follow:
Let the curve f(x) = |x - 3|

What is the domain of the function (f(x))?

Consider the following for the two (02) items that follow:
Let f = {(1, 1), (2, 4), (3, 7), (4, 10)}

If f(x) = px + q then what is the value of (p + q) ?