Question

The roster form the set D = {t: t³ = t, t & R}​

Answer 1

Step-by-step explanation:

Given :D = {t | t3 = t, t ∈ R}

To find: Roster form of given set

t3 = t

⇒ t3 – t = 0

⇒ t(t2 – 1) = 0

⇒ t(t – 1)(t + 1) = 0

⇒ t = 0, -1 or 1

So, D = {-1, 0, 1}