“Nobody ever wrote down a plan to be broke, fat, lazy. or stupid. Those things are what happen when you don’t have a plan.” – Larry Winget
| NCERT EXERCISE 1.4 |
- Find the union of each of the following pairs of sets:
- (i) X = {1, 3, 5} Y = {1, 2, 3}
- A = { a, e, i, o, u} B = {a, b, c}
- A = {x : x is a natural number and multiple of 3}
B = {x : x is a natural number less than 6} - A = {x : x is a natural number and 1 < x ≤ 6 }
B = {x : x is a natural number and 6 < x < 10 } - (v) A = {1, 2, 3}, B = f
- Let A = { a, b }, B = {a, b, c}. Is A ⊂ B ? What is A ∪ B ?
- If A and B are two sets such that A ⊂ B, then what is A ∪ B ?
- If A = {1, 2, 3, 4},B = {3, 4, 5, 6}, C = {5, 6, 7, 8 }and D = { 7, 8, 9, 10 }; find
- (i) A ∪ B
- A ∪ C
- B ∪ C
- B ∪ D
- (v) A ∪ B ∪ C
- A ∪ B ∪ D
- B ∪ C ∪ D
- Find the intersection of each pair of sets of question 1 above.
- If A = { 3, 5, 7, 9, 11 },B = {7, 9, 11, 13},C = {11, 13, 15} and D = {15, 17}; find
- (i) A ∩ B
- B ∩ C
- A ∩ C ∩ D
- A ∩ C
- (v) B ∩ D
- A ∩ (B ∪ C)
- A ∩ D
- A ∩ (B ∪ D)
- ( A ∩ B ) ∩ ( B ∪ C )
- (x) ( A ∪ D) ∩ ( B ∪ C)
- If A = {x : x is a natural number},B = {x : x is an even natural number}C = {x : x is an odd natural number} and D = {x : x is a prime number }, find
- (i) A ∩ B
- A ∩ C
- A ∩ D
- B ∩ C
- (v) B ∩ D
- C ∩ D
- Which of the following pairs of sets are disjoint
- (i) {1, 2, 3, 4} and {x : x is a natural number and 4 ≤ x ≤ 6 }
- { a, e, i, o, u } and { c, d, e, f }
- {x : x is an even integer } and {x : x is an odd integer}
- If A = {3, 6, 9, 12, 15, 18, 21}, B = { 4, 8, 12, 16, 20 },C = { 2, 4, 6, 8, 10, 12, 14, 16 }, D = {5, 10, 15, 20 }; find
- (i) A – B
- A – C
- A – D
- B – A
- (v) C – A
- D – A
B – C
- B – D
- C – B
- (x) D – B
- C – D
- D – C
- If X= { a, b, c, d } and Y = { f, b, d, g}, find
- (i) X – Y
- Y – X
- X ∩ Y
- If R is the set of real numbers and Q is the set of rational numbers, then what is R – Q?
- State whether each of the following statement is true or false. Justify your answer.
- (i) { 2, 3, 4, 5 } and { 3, 6} are disjoint sets.
- {a, e, i, o, u} and {a, b, c, d} are disjoint sets.
- {2, 6, 10, 14} & {3, 7, 11, 15} are disjoint sets.
- { 2, 6, 10 } and { 3, 7, 11} are disjoint sets.