Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET2018MathematicsSets and Relations

If X = 4 n - 3 n - 1 : n ∈ N and Y = 9 n - 1 : n ∈ N , then X ∩ Y =

Options

  1. AX
  2. BY
  3. Cϕ
  4. D0

Correct answer

A. X

Step-by-step solution

X = 4 n − 3 n − 1 : n ∈ N X = ( 1 + 3 ) n − 3 n − 1 : n ∈ N X = 1 + 3 n + 3 2 n ( n − 1 ) 2 ! + 3 3 n ( n − 1 ) ( 2 n − 1 ) 6 ....3 n − 1 X = 3 2 ( n − 1 ) n ( 1 2 ! + 3 ( 2 n − 1 ) 6 + ..... ) X = 9 ( n − 1 ) n ( 1 2 ! + ...... ) Y = 9 ( n − 1 ) : n ∈ N ∴ X ⊆ Y ∴ X ∩ Y = X (or) Put n = 1 , 2 , 3 , 4 , 5 , 6 , ..... in X and Y X = 0 , 9 , 54 , .... Y = 0 , 9 , 18 , 27 , 36 , 45 , 54 , 63...... X ⊆ Y ∴ X ∩ Y = X

Practice Sets and Relations on Quantrex Academy →

More from Sets and Relations

Let A and B be two subsets of = 1, 2, 3, -------, 44, 45 such that A = x: x is divisible by 3 and 4 B = x: x is a perfect square number Then n(B - A) equals 2026Given the sets A = 1,2,3 ; B = 2,3,5 and C = 4,5,6 identify Which of the following statements is incorrect . 2026If A = x : x is the first three odd numbers B = 2x + 3 : 0 x true 2026The set expression A (B (A' B')) is equivalent to 2026Let C be the set of all the circles in a plane. If R = (C₁, C₂) C C C₁ and C₂ intersect , then which of the following statements is TRUE? 2026If A = a, b, c, d, e, f , then the number of subsets of A which contains at least 2 elements is 2026If A = 1, 2, 3, 4, , 10 , then the number of non-empty subsets of A containing only even number is 2026If n(A) = 2 and the number of relations from set A to set B is 1024 , then n(B) is 2026 Full Sets and Relations list All MHT CET PYQs