Solve the differential equation dy/dx = 6x^2y.

Practice Questions

Q1
Solve the differential equation dy/dx = 6x^2y.
  1. y = Ce^(2x^3)
  2. y = Ce^(3x^2)
  3. y = Ce^(6x^2)
  4. y = Ce^(x^6)

Questions & Step-by-Step Solutions

Solve the differential equation dy/dx = 6x^2y.
  • Step 1: Identify the differential equation: dy/dx = 6x^2y.
  • Step 2: Recognize that this is a separable equation, meaning we can separate y and x.
  • Step 3: Rewrite the equation to separate variables: dy/y = 6x^2 dx.
  • Step 4: Integrate both sides: ∫(1/y) dy = ∫6x^2 dx.
  • Step 5: The left side integrates to ln|y|, and the right side integrates to 2x^3 + C (where C is the constant of integration).
  • Step 6: Write the equation from the integrals: ln|y| = 2x^3 + C.
  • Step 7: Exponentiate both sides to solve for y: |y| = e^(2x^3 + C).
  • Step 8: Rewrite e^(C) as a new constant, say C', so |y| = C'e^(2x^3).
  • Step 9: Since y can be positive or negative, we can drop the absolute value: y = Ce^(2x^3), where C can be any real number.
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