Formation of a differential equation generally involves?
A
Integrating an equation
B
Eliminating arbitrary constants
C
Eliminating derivatives
Analysis & Theory
A differential equation is formed by eliminating arbitrary constants from the given relation.
How many times should we differentiate an equation containing n arbitrary constants to form a differential equation?
Analysis & Theory
If an equation contains n arbitrary constants, it is differentiated n times to eliminate them.
The order of the differential equation formed is equal to?
A
The number of variables
B
The highest derivative obtained after eliminating constants
C
The number of constants present
D
The degree of the equation
Analysis & Theory
The order is determined by the highest derivative present after eliminating arbitrary constants.
From y = c (where c is a constant), the differential equation formed is?
Analysis & Theory
Differentiating y = c gives dy/dx = 0.
From y = mx + c, eliminating m and c gives?
Analysis & Theory
y = mx + c contains two arbitrary constants (m, c). Differentiating twice gives d²y/dx² = 0.
From x² + y² = a², the differential equation formed is?
Analysis & Theory
Differentiating x² + y² = a² gives 2x + 2y(dy/dx) = 0, i.e. dy/dx = -x/y. Equivalent forms are acceptable.
From y = Ae^x + Be^(-x), eliminating A and B gives?
Analysis & Theory
Differentiating twice and eliminating A, B gives d²y/dx² - y = 0.
If a curve passes through the origin and is represented by y² = 4ax, the differential equation formed is?
Analysis & Theory
Differentiating y² = 4ax gives 2y(dy/dx) = 4a ⇒ y(dy/dx) = 2x.
In formation of differential equations, constants are removed by?
Analysis & Theory
Differentiation is used to eliminate arbitrary constants in formation of differential equations.
The differential equation formed from y = A cos x + B sin x is?
Analysis & Theory
Differentiating twice and eliminating A, B gives d²y/dx² + y = 0.