Example 16 - Chapter 14 Class 11 Mathematical Reasoning

Last updated at May 29, 2018 by Teachoo

Example 16 - By giving a counter example, show that statement - Proving not true/false (by giving counter examples)

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Example 16 By giving a counter example, show that the following statement is false. If n is an odd integer, then n is prime. Let n = 9 Here, n = 9 is odd But n = 9 is not prime Hence the given statement is false

Proving not true/false (by giving counter examples)

Example 16 Not in Syllabus - CBSE Exams 2021 You are here

Proving True - If and only if →

Chapter 14 Class 11 Mathematical Reasoning

Concept wise

Statements
Writing negation of statements
Negation - Checking if true or not
Finding Compound Statement
Words 'And' & 'Or'
Inclusive and exclusive or
Quantifiers
Contrapositive and converse
If then
If and only if
Proving not true/false (by giving counter examples)
Proving True - If and only if
Proving True - By Contrapositive
Proving True - By Contradiction
Necessary and sufficient condition

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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.