Question 7 - CBSE Class 12 Sample Paper for 2026 Boards - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at August 14, 2026 by Teachoo

This question is exactly same as Ex 5.1, 28 – Chapter 5 Class 12 NCERT Book – Continuity and Differentiability

Please check the answer here

https://www.teachoo.com/3774/697/Ex-5.1--28---Find-k-so-that-f(x)----kx---1--cos-x-at-x--pi/category/Ex-5.1/

If a function defined by 𝑓(𝑥)={(𝑘𝑥+1, 𝑥 ≤ 𝜋 cos 𝑥, 𝑥 > 𝜋) is - CBSE Class 12 Sample Paper for 2026 Boards

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Transcript

Question 7 If a function defined by 𝑓(𝑥)={■(𝑘𝑥+1,&𝑥≤𝜋@cos 𝑥,&𝑥>𝜋)┤ is continuous at 𝑥=𝜋, then the value of 𝑘 is (A) 𝜋 (B) (−1)/𝜋 (C) 0 (D) (−2)/𝜋 This question is exactly same as Ex 5.1, 28 – Chapter 5 Class 12 NCERT Book – Continuity and Differentiability Please check the answer here https://www.teachoo.com/3774/697/Ex-5.1--28---Find-k-so-that-f(x)----kx---1--cos-x-at-x--pi/category/Ex-5.1/ So, the correct answer is (D)

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