Question

Let f : R – `{3/5}`→ R be defined by f(x) = `(3"x" + 2)/(5"x" - 3)` Then ____________.

Options

•  f^-1(x) = f(x)

•  f^-1(x) = -f(x)

• (fof) x = -x

• f^-1(x) = `1/19` f(x)

Answer 1

Let f : R – `{3/5}`→ R be defined by f(x) = `(3"x" + 2)/(5"x" - 3)` Then  f^-1(x) = f(x).