which types of Differential equations can be solved using Laplace transformation? which are not possible to solve using Laplace transform?

1.2k Views Asked by At

please if you are not going to answer and instead tell me that I should know this because its 3rd grade math then simply dont respond. I never get straightforward answers on this forum, only sarcastic ones. I am not a math prodigy I dont understand all notation, I just want an answer to the question, not a reality check that I know nothing.

I believe this question can be easily answered by those who know

Thx to those that will answer in a straightforward manner.

1

There are 1 best solutions below

5
On

In general, the Laplace Transform is usually applied to the Linear Differential Equations, with constant coefficients and non-homogeneous (when $g(x)$ is any function different than a constant, i.e. a function of the denpendent variable, $x$). For instance:

$$y'''(x) - 5y'(x) = g(x)$$

However, we may use the Laplace Transform so as to solve some integro-differential equations (equations with derivatives of $y$ and integrals) as well as some definite and improper integrals. For instance:

$$y''(x) + y'(x) + \int_0^xy(u)du = g(x)$$ $$\int_0^{\pi/2} \frac{\sin(x)}{x}dx = \frac{\pi}{2}$$

That's possible because:

$$\mathcal{L} \left( \int_0^xy(u)du \right) = \frac{\bar{y}(s)}{s}$$