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

a,b and c.

Step-by-step explanation:

We have to find the the functions that are their own inverses.

a.t(p)=p

Then the inverse function of given function is

Therefore, the given function is inverse function of itself.

Hence, option a is true.

b.y(j)=

Hence, the function is inverse of itself.Therefore, option b is true.

c.

Suppose that w(y)=w

Then

Hence, the function is inverse function of itself.Therefore, option c is true.

d.

Let d(p)=d

If we replace

Hence, the function is not self inverse function.Therefore, option d is false.