Solving Separable Equations in Differential Equations
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Questions and Answers

Separable equations can be written as y' = P(X)Q(Y), where P(X) and Q(Y) are continuous functions.

True

The equation 2xy - 1 dX + x^2 - 1 dy = z, has the formal solution ln(x^2 - 1)(y - 1) = C, with the restriction that X is not equal to +/-1 and y is not equal to 1.

False

The video provides an example of finding the general solution for the equation 1 + e^(-y) dX - e^(-2y) sin(Q(x)) dy = 0, with the initial value y = Pi/2 = 0.

False

Singular points are points where a differential equation is not separable and require separate discussion.

<p>True</p> Signup and view all the answers

The differential equation DP/DT = t/(t^2 + 1) * P(T) is separable

<p>True</p> Signup and view all the answers

The left area of a circular plant leaf is directly proportional to the intensity of light

<p>False</p> Signup and view all the answers

The angle, Θ(T), is a linear function of time between sunrise and sunset

<p>True</p> Signup and view all the answers

The temperature at a distance of 8 cm from the center of the hollow iron ball can be solved using the given temperature gradient and thermal conductivity

<p>False</p> Signup and view all the answers

Homogeneous equations are defined as functions G(x, y) that maintain the same degree when all variables are multiplied by a nonzero constant.

<p>True</p> Signup and view all the answers

To solve a differential equation dy/dx = x² + y²/xy, a substitution is made by letting y = Vx, resulting in a separable equation.

<p>False</p> Signup and view all the answers

A nonlinear differential equation y' = F(ax + b, y + C) can be transformed into a new equation when taking the derivative, resulting in V' = a + bF(V).

<p>True</p> Signup and view all the answers

The general solution for the differential equation dy/dx = x² + y²/xy is found by integrating both sides and solving for V, resulting in Ln(Cx) or Ln(C) + Ln(x).

<p>True</p> Signup and view all the answers

Study Notes

  • The video discusses the concept of separable equations in the context of solving differential equations.
  • An equilibrium point or stationary point is a constant solution to a differential equation, which holds for all X in the given domain.
  • Separable equations are a type of differential equation where the function F(X,Y) is a product of a function of X and a function of Y.
  • Separable equations can be written as y' = P(X)Q(Y), where P(X) and Q(Y) are continuous functions.
  • To solve a separable equation, divide both sides by Q(Y) to get y' = P(X)/Q(Y).
  • Integrating both sides and assuming u = Y, the general solution can be written in implicit form as ∫1/Q(Y)dY + C = ∫P(X)dX.
  • Singular points are points where a differential equation is not separable and require separate discussion.
  • Given the equation 2xy - 1 dX + x^2 - 1 dy = z, the formal solution is ln(x^2 - 1)(y - 1) = C, with the restriction that X is not equal to +/-1 and y is not equal to 1.
  • The video provides an example of finding the general solution for the equation 1 + e^(-y) dX - e^(-2y) sin(Q(x)) dy = 0, with the initial value y = Pi/2 = 0.
  • The equation has infinite constant solutions, and the solution for x = n (an integer) is not valid if n is not in the domain of sin(cx)^3.
  • The video invites the audience for further exercise in continuing the solution for the example problem.
  • The video concludes by encouraging questions and subscribing for more videos.

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Learn to solve separable equations and understand concepts like equilibrium points, singular points, and general solutions in the context of differential equations. The video provides examples and encourages further practice.

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