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Ex 1.2, 5 - Are the sets equal? (i) A = {2, 3}; B = {x: x is - Equal sets

  1. Chapter 1 Class 11 Sets
  2. Serial order wise
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Ex 1.2,5 Are the following pair of sets equal? Give reasons. (i) A = {2, 3}; B = {x: x is solution of x2 + 5x+ 6 = 0} A = {2, 3} B = {x: x is a solution of x2 + 5x + 6 = 0} Solving x2 + 5x + 6 = 0, x2 + 2x + 3x + 6 = 0 x(x + 2) + 3(x + 2) = 0 (x + 2)(x + 3) = 0 x = –2 or x = –3   B = {–2, –3} -2 is in set B, but not in set A As every element of A is NOT same as every element of B ∴ A ≠ B Ex 1.2,5 Are the following pair of sets equal? Give reasons (ii) A = {x: x is a letter in the word FOLLOW}; B = {y: y is a letter in the word WOLF} A = {x: x is a letter in the word FOLLOW} = {F, O, L, W} B = {y: y is a letter in the word WOLF} = {W, O, L, F} Elements of set A = F, O, L, W Elements of set B = F, O, L, W Every element of A is same as every element of B. ∴ A = B

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