Which of the following functions are their own inverses? Select all that apply.a. t(p) = pb. y(j) = -1/jc. w(y) = -2/yd. d(p) = 1/x^2

A function is its own inverse if it is symmetrical about the line y=x. This is the case for functions t, y, w. Function d(x) = 1/x^2 is symmetrical about the line x=0, but is not symmetrical about the line y=x.

The appropriate choices are ...
  a. t(p) = p
  b. y(j) = -1/j
  c. w(y) = -2/y