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 = ....
Graph sample of linear equations. A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of) a single variable.Linear equations can have one or more variables. Linear equations occur abundantly in most subareas of mathematics and especially in applied mathematics. linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of) a single variable.