Permutation and CombinationHard
Question
Which of the following is the empty set ?
Options
A.{x : x ∈ R and x2 + x + 1 = 0}
B.{x : x ∈ R and x2 − x + 1 = 0}
C.{x : x ∈ R and x2 + 2x + 1 ≤ 0}
D.{x : x ∈ R and x2 − 2x + 1 ≥ 0}
More Permutation and Combination Questions
How many nine digit numbers can be formed using the digits 2, 2, 3, 3, 5, 5, 8, 8, 8 so that the odd digits occupy even ...2nPn is equal to...There are 12 points in a plane. The number of the straight lines joining any two of them when 3 of them are collinear is...In a unique hockey series between India & Pakisthan, they decide to play on till a team wins 5 matches. The number of wa...How many words can be formed from the letters of the word ′BHOPAL′ -...