Question -
Answer -
(i) True
1 belongs to the given set {1, 2, 3} as it is present in it.
(ii) False
Since, a is an element and not a subset of a set {b, c, a}
(iii) False
Since, {a} is a subset of set {b, c, a} and not an element.
(iv) True
We do not repeat same elements in a given set.
(v) False
Given, x+8 = 8
i.e. x = 0
So, the given set is a singleton set {0}. Where it is not a null set.