Differential Equations — Revision Notes
BITSAT · Mathematics
Quick revision notes for Differential Equations — key concepts, formulas, and definitions for BITSAT Mathematics preparation.
Revision Notes — Differential Equations
Key concepts, formulas, and definitions from Differential Equations for BITSAT Mathematics preparation.
Key Topics to Revise
Basic Concepts and Definitions
- A differential equation involves derivatives of dependent variables with respect to independent variables
- Order is determined by the highest derivative present
- Degree is the power of the highest order derivative (when polynomial form)
Formation of Differential Equations
- To form differential equation from general solution, differentiate and eliminate arbitrary constants
- Number of differentiations = number of arbitrary constants
- Final equation should be free from arbitrary constants
Variable Separable Method
- Applicable when equation can be written as dy/dx = f(x)g(y)
- Separate variables: dy/g(y) = f(x)dx
- Integrate both sides and add constant of integration
Homogeneous Differential Equations
- Equation of form dy/dx = f(x,y)/g(x,y) where f,g are homogeneous functions of same degree
- Substitute y = vx, so dy/dx = v + x(dv/dx)
- Equation becomes separable in variables v and x
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Key Concepts
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What topics are covered in Differential Equations for BITSAT?
Differential Equations is an important chapter in BITSAT Mathematics. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Basic Concepts and Definitions, Formation of Differential Equations, Variable Separable Method, Homogeneous Differential Equations.
How important is Differential Equations for BITSAT?
Differential Equations is a frequently tested chapter in BITSAT Mathematics. Questions from this chapter appear regularly in previous year papers. There are 50 practice questions available for this chapter.
How to prepare Differential Equations for BITSAT?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.