
What is the equation for a 3D line? - Mathematics Stack Exchange
May 28, 2013 · If we want an equation f(x, y) f (x, y) for the line, the domain of f f can only be the shadow of the line on the xy x y plane. But any nice function f f will have as a domain either all …
What is the difference between equation and formula?
An equation is meant to be solved, that is, there are some unknowns. A formula is meant to be evaluated, that is, you replace all variables in it with values and get the value of the formula. …
simple geometry question- equation of cylinder
All points on it have x=0 and y=0. Clearly it is a line with any z-allowed. You could write the equation of the axis as x2 +y2 = 0 x 2 + y 2 = 0, because in the reals the only solution to this …
Equation of a rectangle - Mathematics Stack Exchange
Oct 2, 2011 · I need to graph a rectangle on the Cartesian coordinate system. Is there an equation for a rectangle? I can't find it anywhere.
贝塞尔函数及其性质 - 知乎
贝塞尔方程 (the Bessel differential equation)在物理学诸多领域都有非常广泛的应用,如柱坐标下波的传播,薛定谔方程的解,薄膜振动,热传导等等。下面不加证明地总结贝塞尔函数的一些 …
What exactly is an equation? - Mathematics Stack Exchange
Apr 15, 2018 · the equation to simpler equation (s) and end up with an equation that can be solved by inspection. In all these cases the equality tells you two things are really the same. …
calculus - How to solve this Ordinary Differential Equation ...
Dec 30, 2025 · Thanks but I still do not understand how you change the original equation to x(y) x (y) -land, especially for x′′(y) x ″ (y) part. I know how to change dy dx d y d x to dx dy d x d y by …
How to solve the Riccati's differential equation
reduces it to a linear equation in v v. I am not understanding this, what does f f mean? How can we find the solution with the help of the solution itself. I hope anyone could help me to solve …
Ellipse general equation from dimensions, offset, and tilt angle
Aug 13, 2020 · Ellipse general equation from dimensions, offset, and tilt angle Ask Question Asked 5 years, 4 months ago Modified 5 years, 4 months ago
How to Install Microsoft Equation 3.0 in Office 2016, 2019, 2021, …
Microsoft Equation 3.0 is not included by default in Office 365. To install it, download the standalone installer from Microsoft’s official site or use the legacy Office installer. After …