Activity Questions 1.10
Answer the questions 1-3, based on following information:
Let A = {x|x ∈ ℕ, x < 10 and x is odd}
B = {y|y ∈ ℕ, y is a perfect square and 15 < y < 40}
Q1. Which of the following is a subset of B × A?
○ {(36, 3), (25, 5), (36, 6)}
○ {(1, 25), (6, 36), (7, 25), (3, 36)}
○ {(16, 5), (25, 9), (36, 3), (16, 1)}
○ {(1, 16), (5, 16), (3, 36), (9, 36), (7, 25)}
Solution
Q2. Which of the following is a subset of A × A?
○ {(1, 3), (3, 5), (5, 9), (7, 3), (7, 7)}
○ {(36, 25), (25, 25), (36, 36), (16, 25)}
○ {(3, 3), (1, 5), (3, 6), (9, 9)}
○ {(3, 5), (5, 1), (9, 4), (1, 1), (7, 1)}
Solution
Q3. Which of the following is(are) element(s) of A × B × A?
□ (2, 25, 3)
□ (5, 25, 9)
□ (3, 36, 9)
□ (5, 16, 1)
Solution
Answer the questions 4-5, based on following information:
Suppose the Cartesian product M × M has 9 elements among which 2 elements are (2, 4) and (3, 2).
Q4. Which of the following sets is M?
○ {9, 2, 4}
○ {3, 2, 9}
○ {2, 3, 4}
○ {3, 4, 9}
Solution
Q5. Remaining elements of M × M are
○ {(2, 3), (2, 2), (3, 4), (3, 2), (4, 4), (4, 2), (3, 3)}
○ {(2, 3), (2, 2), (3, 4), (4, 3), (4, 4), (4, 2), (3, 3)}
○ {(2, 3), (2, 2), (4, 3), (2, 4), (4, 4), (4, 2), (3, 3)}
○ {(2, 2), (2, 3), (4, 3), (3, 2), (3, 3), (4, 4), (3, 4)}
Solution
Answer the questions 6-8, based on following information:
Suppose the relation R = {(Snail, Frog), (Bird, Bird), (Fox, Frog), (Snail, Fox)} is defined on the set S = {Snail, Fox, Bird, Frog}.
Q6. The relation R on the set S is(are)
○ Reflexive
○ Symmetric
○ Transitive
○ None of these
Solution
Q7. Let P be a subset of (S × S)\R. What is the set of possible cardinalities of P?
○ {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
○ {}
○ {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}
○ {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
Solution
Q8. What is the minimum number of elements of the Cartesian product S × S that need to be added to R such that the relation becomes symmetric?
○ 4
○ 8
○ 2
○ 3
Solution
Related Chapters 📂
01 A Quick Introduction to Variables
In Python, a variable is essentially a name or a label that refers to a value or stored data. You can think of a variable as a basket in real life used to keep track of information in your program. Variables temporarily store data in the computer’s memory. Variables are created when they are first assigned a value. An assignment statement creates a new variable and gives it a value. For example, price = 10 creates a variable named price and assigns it the integer value 10. Similarly, x = 6 creates a variable x with the value 6.
02 Activity Questions 1.1
“The cafe was like a battleship stripped for action.” The figure of speech used here is ___. Drawing on the information from the sources discussing figures of speech:
🧠03 Activity Questions 1.1
1. Below is a list of numbers: 22, -17, 47, -2000, 0, 1, 43, 1729, 6174, -63, 100, 32, -9. How many natural numbers are there in the given list? a) 6 b) 7 c) 8 d) 9 Solution Based on the sources, the set of natural numbers is denoted by N. This set includes 0, 1, 2, 3, 4, 5, and so on. The sources explicitly state that whenever they are talking about natural numbers, it always includes a 0, even though some books may not. Natural numbers are primarily used for counting.
🧠04 Activity Questions 1.11
Q1. If Dom(f) = {x ∈ ℝ, f(x) ∈ ℝ} defined by f(x) = (x + 12)/(4x - 8), then the domain of the function f is ______ ○ ℝ ○ ℝ \ {1/4} ○ ℝ \ {-12} ○ ℝ \ {2} Solution Q2. The product of the minimum value of the function f(x) = 9|x| - 8 and the maximum value of the function g(x) = 11 - |x + 8| is ______
05 Activity Questions 1.2
Q1. Which among the following use alliteration in its name? a) Kolkata Knight Riders b) Peter Parker c) Big Billion Days d) All of the above Based on the information in the sources, alliteration is a literary device where the first sounds of two adjacent words or phrases are similar or the same. This repetition of the initial sound is used to make language more impactful and rhythmic. Examples from the sources include:
🧠06 Activity Questions 1.2
1. Which of the following option(s) is(are) true? Solution Based on the sources and our conversation history, we can determine which of the given inequalities between fractions are true by finding a common denominator and comparing the numerators. Rational numbers, which include fractions, can be written in the form p/q. To compare two fractions which have different denominators, there is no way to directly compare them. The only way is to convert them into equivalent fractions such that they have the same denominator. A number that is a multiple of both denominators can be used as the common denominator. Once the denominators are the same, you can add the numerators, or in this case, compare them.
🧠07 Activity Questions 1.3
1. Which of the following statement(s) is(are) false? a) The sum of two natural numbers is always a natural number b) The difference between two integers is always an integer c) The product of two rational numbers is always a real number d) The product of two irrational numbers is always an irrational number Solution The statement that is false is:
08 Activity Questions 1.3
1. Which among the following sentences use discourse markers to express opinion Solution Drawing on the information in the sources, discourse markers are words or phrases that can be used to help structure conversation or express the speaker’s attitude or viewpoint. They can appear at the beginning of a sentence and take the entire sentence into their scope.