1. Chapter 1 Class 11 Sets
2. Serial order wise

Transcript

Ex 1.3,3 Let A= {1, 2, {3, 4}, 5}. Which of the following statements are incorrect and why? Ex 1.3,3 Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why? (ii) {3, 4} ∈ A Let {3, 4} = x A = {1, 2, {3, 4,}, 5} So, A = {1, 2, x, 5} Now, x is in set A So, x ∈ A ∴ The statement is correct Ex 1.3,3 Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why? (iv) 1∈ A 1 is an element of A. The statement is correct Ex 1.3,3 Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why? Ex 1.3,3 Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why? (viii) {1, 2, 3} ⊂ A Here, A = {1, 2, {3, 4,}, 5} Let {3, 4} = x So, A = {1, 2, x, 5} 3 is in {1, 2, 3} but not in A So, {1, 2, 3} is not a subset of A So, the given statement is incorrect. Ex 1.3,3 Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why? (ix) ϕ ∈ A ϕ is not an element of A. (It will be If A= {1, ϕ, 2, {3, 4,}, 5} ) The statement is incorrect Ex 1.3,3 Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why?

Chapter 1 Class 11 Sets
Serial order wise