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

Last updated at May 29, 2023 by

Ex 6.2, 1 Class 12 - Show that f(x) = 3x + 17 is strictly increasing

Ex 6.2, 1 - Chapter 6 Class 12 Application of Derivatives - Part 2

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Ex 6.2, 1 (Method 1) Show that the function given by f (đ‘„) = 3đ‘„ + 17 is strictly increasing on R. f(đ‘„) = 3đ‘„ + 17 Finding f’(𝒙) f’(đ‘„) = 3 Since f’(𝒙) > 0 Hence, 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 đ‘„1 and đ‘„2 be real numbers Such that 𝒙𝟏 < 𝒙2 Multiplying both sides by 3 3đ‘„1 < 3 đ‘„2 Adding both sides by 17 3đ‘„1 + 17 < 3đ‘„2 + 17 f (𝒙𝟏) < f ( 𝒙2) Hence, when x1 < x2 , f(x1) < f(x2) Thus, f(x) is strictly increasing on R.

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