# NCERT Class 12-Mathematics: Chapter – 9 Differential Equations Part 17 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 76: Fill in the blanks of the following (i to xi)**

(i) The degree of the differential equation is ________.

**Answer: Not defined**

(ii) The degree of the differential equation is ________.

**Answer: Not defined**

(iii) The number of arbitrary constants in the general solution of a differential equation of order three is ________.

**Answer: (3)**

(iv) is an equation of the type ________.

**Answer**:

(v) General solution of the differential equation of the type is given by ________.

**Answer**:

(vi) The solution of the differential equation is________.

**Answer**:

(vii) The solution of is________.

**Answer**:

(viii) The solution of the differential equation is ________.

**Answer**:

(ix) General solution of is ________.

**Answer**:

(x) The solution of differential equation is ________.

**Answer**:

(xi) The integrating factor of is ________.

**Answer**:

**Question 77: State True or False for the following**:

(i) Integrating factor of the differential of the form is given by

**Answer: True**

(ii) Solution of the differential equation of the type is given by

**Answer: True**

(iii) Correct substitution for the solution of the differential equation of the type ) , where ) is a homogeneous function of zero degree is .

**Answer: True**

(iv) Correct substitution for the solution of the differential equation of the type where is a homogeneous function of the degree zero is .

**Answer: True**

(v) Number of arbitrary constants in the particular solution of a differential equation of order two is two.

**Answer: False**

(vi) The differential equation representing the family of circles will be of order two.

**Answer: False**

(vii) The solution of

**Answer: True**

(viii) Differential equation representing the family of curves is

**Answer: True**

(ix) The solution of the differential equation .

**Answer: True**

(x) Solution of

**Answer: True**

(xi) The differential equation of all non-horizontal lines in a plane is

**Answer: True**