Solving an equation with a parameter and a derivative

In summary, the conversation discussed two approaches for solving a problem involving a second derivative equation. The first approach involved rearranging the equation and identifying a constant, while the second approach involved substituting the previously found derivative into a second equation and solving for a variable. The thread was closed due to the OP repeatedly posting homework-type questions in the wrong forum section.
  • #1
homeworkhelpls
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TL;DR Summary
For 3(i)(b) does anyone know how to find the value of k?
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idk how to start after finding the second derivative
 

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  • #2
You have
$$
\frac{d^2y}{dx^2} = 4 - \frac{15}{4} \sqrt{x}
$$
You can either rearrange that equation so that it looks like
$$
\frac{d^2y}{dx^2} + k \sqrt{x} = 4
$$
and identify what ##k## is, or use a more robust approach by substituting the ##\frac{d^2y}{dx^2}## you have found into that second equation,
$$
\left(4 - \frac{15}{4} \sqrt{x} \right) + k \sqrt{x} = 4
$$
and solve for ##k##.
 
  • #3
Thread closed. The OP has been warned five times previously that homework-type questions must be posted in one of the forum sections devoted to homework questions.
 

FAQ: Solving an equation with a parameter and a derivative

What is an equation with a parameter and a derivative?

An equation with a parameter and a derivative typically involves a function that depends on one or more variables, along with a parameter that can affect the behavior of the function. The derivative represents the rate of change of the function with respect to one of its variables. Such equations are common in differential equations, where parameters can modify the system's dynamics.

How do I identify the parameter in an equation?

The parameter in an equation is usually a constant that influences the equation's behavior but is not directly affected by the variables involved. It can often be identified as a variable that is not differentiated or that does not change as the solution to the equation is sought. Look for terms in the equation that are treated as constants during the solving process.

What methods can be used to solve equations with parameters and derivatives?

Common methods for solving such equations include separation of variables, integrating factors, and numerical methods such as the Runge-Kutta method. Analytical solutions may also be pursued using techniques like substitution or transformation, depending on the specific form of the equation and the parameter involved.

How do parameters affect the solutions of the equation?

Parameters can significantly alter the solutions of an equation by changing the stability, existence, or uniqueness of solutions. For instance, varying a parameter may lead to bifurcations where the system behavior changes qualitatively. Analyzing how solutions depend on parameters often involves studying the parameter space and identifying critical values.

Can I use software to solve equations with parameters and derivatives?

Yes, many software tools and programming languages, such as MATLAB, Mathematica, and Python (with libraries like SciPy), can be used to solve equations with parameters and derivatives. These tools often provide built-in functions for numerical integration and differential equation solving, making it easier to handle complex equations and visualize the effects of parameters.

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