Question

Which of the following is/are not true ?
(A)` P = {x:x=2y+1 "and" y in N}` is a finite set.
(B) `Q= {x : x in R "and" x^(2) + 1 = 0}` is a null set.
(C ) `R = {x : x^(3) +1 = 0 "and" x^(2) + 1= 0}` is a single-ton set.
(D) `S = {x:8 lt x lt 13, x in R)`is an infinite set.
A. (B), (C ) and (D)
B. (A), (C ) and (D)
C. (A and (B)
D. (A) and (C )

Answer 1

Correct Answer - D
(i) Use the concept of Venn diagrams.
(ii) Find the element in P,Q ,R and S and check for their truthfulness.