Sun The sun is the center of the solar system, it is a star, a hot ball of glowing gases. Supply To furnish organs, tissues or cells with a vital element as blood or never fibers. Support To keep going, to uphold. Surroundings The circumstances, conditions or objects by which one is surrounded.
1. Solving Differential Equations (DEs). A differential equation (or DE) contains derivatives or differentials. Our task is to solve the differential equation. This will involve integration at some point, and we'll (mostly) end up with an expression along the lines of  y = ....
The solution process for a first order linear differential equation is as follows. 1  Put the differential equation in the correct initial form, (1). 2  Find the integrating factor, , using (10). 3  Multiply everything in the differential equation by and verify that the left side becomes the product rule and write it as such.