The number of arbitrary constants in a particular solution of a differential equation of 4th order is:
0
Understanding Arbitrary Constants in Differential Equations
A differential equation is an equation that relates a function with its derivatives. The order of a differential equation is the order of the highest derivative appearing in the equation.
The solution to a differential equation describes the function(s) that satisfy the equation. There are generally two types of solutions:
- General Solution: This solution contains arbitrary constants. The number of arbitrary constants in the general solution of a differential equation is equal to the order of the differential equation. These constants arise during the integration process when solving the equation.
- Particular Solution: This solution is derived from the general solution by assigning specific values to the arbitrary constants. These specific values are determined using initial conditions or boundary conditions that are provided along with the differential equation.
Arbitrary Constants in a 4th Order Differential Equation
For a differential equation of 4th order:
- Its general solution will contain 4 arbitrary constants.
- To find a particular solution, we need 4 specific conditions (like initial values of the function or its derivatives at a point, or boundary values at different points).
- Using these 4 conditions, we can set up a system of equations to solve for the specific values of the 4 arbitrary constants.
Once the arbitrary constants in the general solution are replaced by their specific values obtained from the conditions, the resulting solution is the particular solution.
Number of Arbitrary Constants in a Particular Solution
By definition, a particular solution has had its arbitrary constants determined and replaced by fixed numerical values based on given conditions. Therefore, a particular solution does not contain any arbitrary constants.
In the case of a 4th-order differential equation, its general solution has 4 arbitrary constants. However, its particular solution, obtained by applying specific conditions and solving for these constants, will have 0 arbitrary constants remaining.
Therefore, the number of arbitrary constants in a particular solution of a differential equation of 4th order is 0.
Revision Table: Differential Equation Solutions
| Type of Solution | Contains Arbitrary Constants? | Number of Arbitrary Constants (for order n) | Number of Arbitrary Constants (for 4th order) | How it's Obtained |
|---|---|---|---|---|
| General Solution | Yes | n | 4 | Solving the differential equation |
| Particular Solution | No | 0 | 0 | From the general solution using initial/boundary conditions |
Additional Information on Differential Equations and Solutions
Understanding the difference between general and particular solutions is crucial when working with differential equations. The general solution represents a family of curves that satisfy the equation, while a particular solution represents a single specific curve from that family.
For example, the general solution to the differential equation $\frac{dy}{dx} = 2x$ is $y = x^2 + C$, where $C$ is an arbitrary constant. This is a family of parabolas. If we are given an initial condition, say $y(0) = 5$, we can substitute $x=0$ and $y=5$ into the general solution: $5 = 0^2 + C$, which gives $C=5$. The particular solution is then $y = x^2 + 5$. This particular solution has no arbitrary constants.
The number of arbitrary constants in the general solution directly corresponds to the order of the highest derivative in the differential equation because each integration step introduces one constant of integration.
Similar Questions
Degree of the differential equation \( \frac{d^2y}{dx^2} + 3 \left( \frac{dy}{dx} \right)^{\frac{1}{2}} = y^2 + e^x \) is:
General solution of the differential equation \( \frac{2y dx - 3x dy}{y} = 0 \) is (c is an arbitrary constant):
The integrating factor of the differential equation:
\[ x \frac{dy}{dx} - 2y = x^3 \]
is:
Important Questions from Differential Equations
Anubhav spent 14% of his income on electricity bills, 28% on rent and 18% on shopping. If 4/5 of the remaining amount is ₹ 5120, how much did he spend on electricity bills?
Arun's speed of swimming in still water is 5 km/hr. He swims between two points in a river and returns back to the same starting point. He took 20 minutes more to cover the distance upstream than downstream. If the speed of the stream is 2 km/hr, then the distance between the two points is :
If \( f(x) = 2 \left( \tan^{-1}(e^x) - \frac{\pi}{4} \right) \), then \( f(x) \) is:
Match List-I with List-II:
List-I List-II (A) Integrating factor of \( xdy - (y + 2x^2)dx = 0 \) (I) \( \frac{1}{x} \) (B) Integrating factor of \( (2x^2 - 3y)dx = xdy \) (II) \( x \) (C) Integrating factor of \( (2y + 3x^2)dx + xdy = 0 \) (III) \( x^2 \) (D) Integrating factor of \( 2xdy + (3x^3 + 2y)dx = 0 \) (IV) \( x^3 \) Choose the correct answer from the options given below:
If t = e2x and y = loge(t2), then d2y/dx2 is :
