equation：等式，方程式 英英释义： An assertion that two expressions are equal, expressed by writing the two expressions separated by an equal sign; from which one is to determine …
An equation is any expression with an equals sign, so your example is by definition an equation. Equations appear frequently in mathematics because mathematicians love to use equal signs. A …
It seems to me an equation, in an abstract sense, must always involve some varying quantities where the varying quantities belong in some space (set, algebraic structure, what have …
If we want an equation $f (x, y)$ for the line, the domain of $f$ can only be the shadow of the line on the $xy$ plane. But any nice function $f$ will have as a domain either all pairs $ (x, y)$, or …
(The polar equation above avoids this, because the center is not fixed at the origin.) Of course, as Intelligenti pauca points out, there is the general second degree equation - but this hides …
I want to derive the equation of motion for the an average skydiver free falling to earth with air resistance, most the solution online doesn't use the drag force formula to avoid making the problem
What is the equation for a 3D line? - Mathematics Stack Exchange
geometry - Is there a unified equation for ellipses, parabolas, and ...