Question

Jawaban serta cara nomor d jangan lupa anggotanya bilangan real.

Answer 1

T+1/3 < t-1 (dikaliin 3 dulu)
=t+1< 3 t- 3
t-3t<-3-1
-2t<-4
t>2

anggota t = 3,4,5,...

Answer 2

t +1  < t -1
  3

t +1 < 3(t -1)
t +1 < 3t -3
t -3t < -3 -1
-2t < -4
t < -4/-2
t > 2

Jadi, HP = {3, 4, 5,......}.