01Which option gives the best symbolic identification of a reflexive relation?किस विकल्प में परावर्ती संबंध की सबसे अच्छी प्रतीकात्मक पहचान दी गई है?
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Mathematics
Reflexive relation
In Class 12 Mathematics, under Relations and Functions, students study a reflexive relation as a relation R on a set A in which every element is related to itself: (a, a) ∈ R for every a ∈ A. They learn to verify this condition from ordered pairs, tables, matrices, and arrow diagrams, and to identify examples and non-examples. The topic also helps students distinguish reflexivity from other relation properties such as symmetry and transitivity.
Medium · Level 7 · 4 questions
Practice questions
02A student says that a relation on (A={1,2,3}) is reflexive because it contains ((1,1)) and ((2,2)). What missing point should the teacher mention?एक छात्र ने कहा कि (A={1,2,3}) पर संबंध परावर्ती है क्योंकि उसमें ((1,1)) और ((2,2)) हैं। शिक्षक को कौन-सी कमी बतानी चाहिए?
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Answer and explanationउत्तर और व्याख्या
03If \(f(x)=2x+3\) and \(f(a)=11\), what is the value of \(a\)?यदि \(f(x)=2x+3\) और \(f(a)=11\) है, तो \(a\) का मान क्या होगा?
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Answer and explanationउत्तर और व्याख्या
04If \(f(x)=kx-3\) and \(f(4)=17\), what is the value of \(k\)?यदि \(f(x)=kx-3\) तथा \(f(4)=17\) है, तो \(k\) का मान क्या होगा?
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