Ex 6.3, 4 (iii) - Chapter 6 Class 12 Application of Derivatives

Last updated at August 25, 2026 by

Ex 6.3, 4 (iii) - Prove that h(x) = x^3 + x^2 + x + 1 does not have - Ex 6.3

part 2 - Ex 6.3, 4 (iii) - Ex 6.3 - Serial order wise - Chapter 6 Class 12 Application of Derivatives

Remove Ads Take short quiz All Quiz and Worksheets
Teachoo · Class 12 Explore Class 12

Transcript

Ex 6.3, 4 Prove that the following functions do not have maxima or minima: (iii) ℎ(𝑥)= 𝑥^3+𝑥^2+𝑥+1Here 𝑎 = 3, b = 2, & c = 1 x = (− 2 ± √(4 − 4(3)(1)))/6 x = (− 2 ± √(4 − 12))/6 x = (−2 ± √(− 8))/6 x = (− 2 ± 2√(− 2))/6 x = (−𝟏 ± √(− 𝟐))/𝟑 Since root has minus sign, x has no real value ∴ h (x) does not have a maxima of minima

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.