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NCERT Solutions class 12 Maths Exercise 9.1 Class 12 Maths book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 12 Maths chapter wise NCERT solution for Maths part 1 and Maths part 2 for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.

**Download NCERT solutions for Differential Equations as PDF**

## NCERT Solutions class 12 Maths Differential Equations

**Determine order and degree (if defined) of differential equations given in Questions 1 to 10:**

**1. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 4.

The given differential equation is not a polynomial equation in derivatives as the term is a T-function of derivative Therefore the degree is not defined.

Hence, order is 4 and degree is not defined.

**2. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 1.

The given differential equation is a polynomial equation in derivative and the highest power raised to highest order derivative is one, so its degree is 1.

Hence, order is 1 and degree is 1.

**3. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 2. The given differential equation is a polynomial equation in derivatives and the highest power raised to highest order derivative is one, so its degree is 1.

Hence, order is 2 and degree is 1.

**4. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 2.

The given differential equation is not a polynomial equation in derivatives as the term is a T-function of derivative Therefore the degree is not defined.

Hence, order is 2 and degree is not defined.

**5. **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 2.

The given differential equation is a polynomial equation in derivatives and the highest power raised to highest order is one, so its degree is 1.

Hence, order is 2 and degree is 1.

**6. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 3.

The given differential equation is a polynomial equation in derivatives and the highest power raised to highest order is two, so its degree is 2.

Hence, order is 3 and degree is 2.

**7. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 3.

The given differential equation is a polynomial equation in derivatives and and the highest power raised to highest order is two, so its degree is 1.

Hence, order is 3 and degree is 1.

**8. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 1.

The given differential equation is a polynomial equation in derivative . It may be noted that is an exponential function and not a polynomial function but is not an exponential function of derivatives and the highest power raised to highest order derivative is one so its degree is one.

Hence, order is 1 and degree is 1.

**9. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 2.

The given differential equation is a polynomial equation in derivatives and and the highest power raised to highest order is one, so its degree is 1.

Hence, order is 2 and degree is 1.

### NCERT Solutions class 12 Maths Exercise 9.1

**10. **** **

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 2.

The given differential equation is a polynomial equation in derivative and . It may be noted that is not a polynomial function of , it is a T-function of but is not a T-function of derivatives and the highest power raised to highest order derivative is one so its degree is one.

Hence, order is 2 and degree is 1.

### NCERT Solutions class 12 Maths Exercise 9.1

**11. The degree of the differential equation **** is:**

**(A) 3 **

**(B) 2 **

**(C) 1 **

**(D) Not defined**

**Ans. **Given: ……….(i)

This equation is not a polynomial in derivatives as is a T-function of derivative

Therefore, degree of given equation is not defined.

Hence, option (D) is correct.

### NCERT Solutions class 12 Maths Exercise 9.1

**12. The order of the differential equation **** is:**

**(A) 2 **

**(B) 1 **

**(C) 0 **

**(D) Not defined**

**Ans. **Given:

The highest order derivative present in the differential equation is and its order is 2.

Therefore, option (A) is correct.

## NCERT Solutions class 12 Maths Exercise 9.1

NCERT Solutions Class 12 Maths PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 12 Maths includes text book solutions from both part 1 and part 2. NCERT Solutions for CBSE Class 12 Maths have total 20 chapters. 12 Maths NCERT Solutions in PDF for free Download on our website. Ncert Maths class 12 solutions PDF and Maths ncert class 12 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide

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