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 …

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. …

首先，我们要明白这两个环境分别能干什么。下面两段文字摘抄自l-short: 单独成行的行间公式在LaTeX里由equation环境包裹。 更多情况的是，我们需要罗列一系列公式，并令其按照等号对 …

Nov 17, 2013 · When you square an equation, the result doesn't remember what the signs of the numbers were beforehand. A squared equation is really two equations put into one: the …

Dec 31, 2014 · equation：等式，方程式 英英释义： An assertion that two expressions are , expressed by writing the two expressions separated by an equal sign; from which one is to …

May 20, 2020 · A circle in R3 doesn't exactly have "an equation" in the sense that a circle in the plane or a sphere in space has an equation. Intuitively, "an equation" cuts down the dimension …

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.

Apr 2, 2017 · This is a general question about mathematical writing especially for writing research papers and the like. Question: Do you precede an equation with a comma or colon? Example …

Could anyone here provide us an equation that generates a beautiful or unique shape when we plot? For example, this is old but gold, I found this equation on internet: $$ \large\color {blue} { …

is called Riccati's equation show that if f is any solution of the equation, then the transformation y = f + 1 v reduces it to a linear equation in v. I am not understanding this, what does f mean? …