# Ex 6.2, 1 - Chapter 6 Class 12 Application of Derivatives

Last updated at July 18, 2019 by Teachoo

Last updated at July 18, 2019 by Teachoo

Transcript

Ex 6.2,1(Method 1) Show that the function given by f ( ) = 3 + 17 is strictly increasing on R. f( ) = 3 + 17 f ( ) = 3 value of f ( ) is positive for all real number Hence f ( ) = positive for all R f is strictly increasing on R Ex 6.2,1(Method 2) Show that the function given by f (x) = 3x + 17 is strictly increasing on R. Let 1 and 2 be real numbers Such that 1 < 2 Multiplying both sides by 3 3 1 < 3 2 Adding both sides by 3 3 1 + 17 < 3 2 + 17 f ( 1) < f ( 2) Hence if 1 < 2 Then f ( 1) < f ( 2) Hence f is strictly increasing on R

Chapter 6 Class 12 Application of Derivatives

Serial order wise

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.