# Example 10 - Chapter 6 Class 12 Application of Derivatives

Last updated at Dec. 8, 2016 by Teachoo

Last updated at Dec. 8, 2016 by Teachoo

Transcript

Example 10 Find the intervals in which the function f given by f (x) = x2 4x + 6 is (a) strictly increasing (b) strictly decreasing f ( ) = 2 4 + 6 Step 1 Calculate f ( ) ( ) = 2 4 Step 2 Calculate f ( ) = 0 2 4 = 0 2 = 4 = 4 2 =2 Hence = 2 divide real line into 2 disjoint intervals. Step 3 Drawing graph

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Chapter 6 Class 12 Application of Derivatives

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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 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.