# NCERT Class 12-Mathematics: Chapter –9 Differential Equations Part 9

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## Long Answer (L.A.)

**Question 25:**

Solve:

**Answer:**

Given differential equation is

Dividing both sides by we get

Which is a linear differential equation.

On comparing it with we get

The complete solution is

The general solution is

Now,

And

On substituting of value of

**Question 26:**

Find the general solution of .

**Answer:**

Given differential equation is

On dividing throughout by

Dividing both sides by

Which is a linear differential equation

On comparing it with

The general solution is

**Question 27:**

Solve:

**Answer:**