NCERT Solutions for Class 12 Maths Chapter 5 – Continuity and Differentiability Exercise 5.6

Quick Navigation – Jump to Question

Chapter 5 – Continuity and Differentiability Exercise 5.6

1.

Differentiate function with mod values – Q1 Exercise 5.6
Solved NCERT Answer – Derivative with modulus function – Q1

2.

Check continuity and differentiability of given piecewise function – Q2
Step-by-step continuity check for piecewise function – Q2 Answer

3.

Continuity verification at critical point – Q3 NCERT
Simplified continuity test using limits – Q3 NCERT Solution

4.

Find constants for continuous function – Q4 Class 12
Final answer showing function’s continuity via constants – Q4

5.

“Determine value ensuring differentiability – Q5
Verified differentiability by equating limits – Q5 Answer

6.

Class-12 Continuity-and-Differentiability Exercise-5.6 Question 6- function’s smoothness at defined intervals  - NCERT
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 6 Solved derivative continuity check over given domain- NCERT Answer

7.

Class-12 Continuity-and-Differentiability Exercise-5.6 Question 7-Verify differentiability using limit definition - NCERT
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 7 Limit-based derivative check - NCERT Answer
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 7 Simplified LHL and RHL for continuity- NCERT Answer
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 7  Final proof of differentiability- NCERT Answer

8.

Class-12 Continuity-and-Differentiability Exercise-5.6 Match derivatives at x = 0 and x = a-Question 8 - NCERT
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 8 Left-hand and right-hand derivative comparison – Q8 step1- NCERT Answer

9.

Class-12 Continuity-and-Differentiability Exercise-5.6 Question 9-Prove differentiability for defined function - NCERT
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 9 Complete function continuity evaluation- NCERT Answer
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 9  Second-level verification and result- NCERT Answer

10.

Class-12 Continuity-and-Differentiability Exercise-5.6 Continuity of logarithmic-based function – Q10 Exercise 5.6-Question 10 - NCERT
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 10 Step-by-step continuity check using log rules – Q10 step1- NCERT Answer
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 10 differentiation check of logarithmic function- NCERT Answer

11.

Determine ‘a’ for function to be differentiable – Q11
Simplified approach to ensure differentiability-Q11
Class-12 Continuity-and-Differentiability Exercise-5.6 Question 11 solution for ‘a’ to satisfy condition- NCERT

Download Exercise 5.6 NCERT Solutions PDF

You can download the PDF from the link below for offline study

Class 12 Maths Chapter 5 – Continuity And Differentiability: All Exercises

ExerciseLink
Exercise 5.1View Solutions
Exercise 5.2View Solutions
Exercise 5.3View Solutions
Exercise 5.4View Solutions
Exercise 5.5View Solutions
Exercise 5.7View Solutions
Miscellaneous Exercise View Solutions

Class 12 Continuity And Differentiability- Exercise 5.6 Overview

Examining your grasp of one of the most important ideas in calculus — differentiability at a point and behaviour of functions near that point — Continuity and Differentiability Class 12 NCERT Solutions Exercise 5.6 tests this. This exercise is on determining whether a function is differentiable and, if so, what this suggests regarding the continuity and smoothness of the curve.

This practice becomes especially crucial in the framework of the 2025 revised NCERT syllabus since it links theory with practical analysis — something that not only facilitates CBSE exams but also is crucial in higher courses like engineering and physics. You will deal with absolute value expressions, piecewise functions, and scenarios whereby a function changes behavior around a point—usually x = 0.

Exercise 5.6 distinguishes itself by requiring you to transcend formulas. It calls for logical thinking, left- and right-hand derivative application, and a check for derivative existence at a certain point. Not just a problem-solver, but it strengthens your mental clarity and improves your numerical thinking.

Our detailed answers to Continuity and Differentiability Class 12 NCERT Solutions Exercise 5.6 seek to help you along this mental road map. Great skills to bring into board tests and beyond are learning how to write adequate boundaries, assess differentiability, and form coherent arguments.

FAQs – Continuity And Differentiability Class 12 Exercise 5.6 NCERT

Can a function be non differentiable but continuous?

Indeed, at a place a function can be continuous and yet not be differentiable there. Example will be f(x) = |x| at x = 0.

Should limits be written in every answer?

Indeed, especially when applying first principles to issues evaluating differentiability. Writing correct limit expressions is expected on board tests and displays conceptual understanding.

For this kind of questions on board exams, what marks allocation should I expect?

Usually, they are 3- or 4-mark questions, particularly in cases requiring reasons and boundaries. Logical arguments and well defined procedures allow you to optimize your score.

When will a function not be differentiable at a certain point?

A function is not differentiable at a place if the left-hand and right-hand derivatives at that point vary. Visual indicators of possible failure of differentiability are sharp edges, cusps, or discontinuities

Before looking at differentiability, why must I first find continuity?

A function is non-differentiable if it lacks continuity at a specific point. Differentiability cannot exist without continuity.

For Exercise 5.6, what is the best way to answer the questions?

Check continuity first; then, determine left- and right-hand derivatives using a methodical approach. These let one determine whether the function is 
differentiable.

Class 12 Maths Chapters

Chapter 1 – Relations and Functions
Chapter 2 – Inverse Trigonometric Functions
Chapter 3 – Matrices
Chapter 4 – Determinants
Chapter 5 – Continuity and Differentiability
Chapter 6 – Application of Derivatives
Chapter 7 – Integrals
Chapter 8 – Application of Integrals
Chapter 9 – Differential Equations
Chapter 10 – Vector Algebra
Chapter 11 – Three Dimensional Geometry
Chapter 12 – Linear Programming
Chapter 13 – Probability

Important Questions for Class 12