Activity Questions 1.8
Q1. Let A = {1, 4} and B = {2, 4, 6, 8}. Which of the following is the Cartesian product of A and B?
○ {(1, 2), (1, 4), (1, 6), (1, 8), (4, 1), (4, 4), (4, 6), (4, 8)}
○ {(1, 2), (1, 4), (1, 6), (1, 8), (4, 2), (4, 4), (4, 6), (4, 8)}
○ {(1, 2), (1, 4), (1, 6), (1, 8), (2, 4), (4, 2), (4, 6), (4, 8)}
○ {(1, 6), (1, 8), (2, 4), (2, 6), (4, 2), (4, 4), (4, 6), (4, 8)}
Solution
Solution
Q3. Suppose the Cartesian product A × B has 18 elements. Which of the following options may represent the number of elements in A and B?
□ 3, 9
□ 2, 9
□ 9, 9
□ 6, 3
Solution
Q4. Which of the following statement(s) is(are) true?
□ In a set, order of elements is not important
□ A relation is a subset of Cartesian product
□ In each pair of Cartesian product, order is not important
□ All of the above
Solution
Q5. Let B = {Anil, Ramu, Suraj} and G = {Neha, Keerthi} be the sets of boys and girls respectively. Ramu is brother of Neha, Anil is brother of Keerthi, Suraj is brother of Neha and Keerthi. Let us define a relation R as follows, R = {(a, b) | (a, b) ∈ B × G, a is brother of b}. Which of the following will be R?
○ {(Anil, Keerthi), (Suraj, Neha), (Ramu, Neha), (Suraj, Keerthi)}
○ {(Anil, Keerthi), (Ramu, Keerthi), (Ramu, Neha), (Suraj, Neha)}
○ {(Anil, Neha), (Ramu, Keerthi), (Ramu, Neha), (Suraj, Keerthi)}
○ {(Anil, Keerthi), (Ramu, Neha), (Suraj, Neha), (Ramu, Keerthi), (Anil, Neha), (Suraj, Keerthi)}
Solution
Q6. Let S be a set of students who are studying B.tech first year at I.I.T Madras. Which of the following relations is a symmetric relation?
○ {(a, b) | a, b ∈ S, a is younger than b}
○ {(a, b) | a, b ∈ S, a got more marks in mathematics course than b}
○ {(a, b) | a, b ∈ S, a is classmate of b}
○ {(a, b) | a, b ∈ S, a is taller than b}
Solution
Q7. Which of the following statement(s) is(are) incorrect?
□ An equivalence relation partitions a set
□ An equivalence class is same as equivalence relation
□ Antisymmetric relation is an equivalence relation
□ Elements in Cartesian product will only be in pairs
Solution
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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 1.10
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)}
🧠05 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 ______
🧠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 1.2
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:
🧠08 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: