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 = ....
Simple Definition of Linear Equation: An equation that forms a straight line on a graph. More precisely, a linear equation is one that is dependent only on constants and a variable raised to the first power. For example, \(y=6x+2\) is linear because it has no squares, cubes, square roots, sines, etc. Linear equations can always be manipulated to take this form: