Question

Which of the following is a singleton set ?
(a) {x: x <1, * EI}
(b) {x: x1 = 5, x € I}
(c) {x: *2 = 1, X EI}
(d) {x: x2 + x + 1 = 0, XER}​

Answer 1

Answer:

(d) {x: x2 + x + 1= 50 x E T}

Step-by-step explanation:

the set is { 1/4}

and there is only one number in the set so it is singleton

Answer 2

Step-by-step explanation:

$(a) x < 1.el$