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Example 11 - Chapter 2 Class 11 Relations and Functions
Last updated at Jan. 28, 2020 by Teachoo
Transcript
Example 11 Examine each of the following relations given below and state in each case, giving reasons whether it is a function or not? (i) R = {(2, 1), (3, 1), (4, 2)} The first elements are 2, 3 and 4 All these are not repeating. Hence, they have unique images. So, this relation is a function. In function, first element is not repeating Example 11 Examine each of the following relations given below and state in each case, giving reasons whether it is a function or not? (ii) R = {(2, 2), (2, 4), (3, 3), (4, 4)} The first elements are 2, 2, 3 and 4 Here 2 is coming twice, i.e. it is repeating Hence, this relation is not a function. In function, first element is not repeating Example 11 Examine each of the following relations given below and state in each case, giving reasons whether it is a function or not? (iii) R = {(1, 2), (2, 3), (3, 4), (4, 5), (5, 6), (6, 7)} The first elements are 1, 2, 3, 4, 5 and 6 . All these are not repeating. Hence, they have unique images. So, this relation is a function. In function, first element is not repeating
Examples
Example 1
Example 2
Example 3
Example 4 Important
Example 5
Example 6
Example 7
Example 8 Important
Example 9
Example 10 Important
Example 11 You are here
Example 12
Example 13
Example 14 Important
Example 15 Important
Example 16
Example 17 Important
Example 18
Example 19 Important
Example 20 Important
Example 21 Important
Example 22 Important
Chapter 2 Class 11 Relations and Functions
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About the Author
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.