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📐 Mathematics  ·  Differential Equations  ·  JEE

The existence and uniqueness theorem for y' = f(x,y) with y(x₀) = y₀ requires f to be:

Answer: Continuous and Lipschitz in y (near the initial point).

  • A Constant in both x and y near the initial point
  • B Continuous and Lipschitz in y (near the initial point)
  • C Periodic in x with some fixed, known period
  • D Polynomial in both x and y throughout the domain

Correct answer: B. Continuous and Lipschitz in y (near the initial point)

Explanation: Picard-Lindelof theorem: unique solution exists if f is continuous and satisfies Lipschitz condition in y in a rectangle around (x₀,y₀).

Family of Solution Curves: y = Ax²Each value of the constant A gives ONE particular curve from the family

The general solution y=Ax² represents an entire FAMILY of curves, one for each value of the arbitrary constant A; a particular solution (fixed by an initial condition) selects exactly one curve from this family.

Concept context

Equations involving derivatives and their solutions

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