An equation is a statement that connects two expressions with an $=$ sign and asserts their equality. An identity is an equation that holds for every variable tuple for which the equation is …

May 28, 2013 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …

Dec 31, 2014 · Equation常指方程,用方程来求解未知数,或者解出多个未知数间的对应关系. equation作为等式用的情况我感觉不常见,可能是某些常用的方便计算的式子,或者某些先决条 …

Apr 15, 2018 · An equation is the statement that two things are equal "equal", "equate". "equality" and "equation" are different forms of the same word. In mathematics the "=" sign is put …

Apr 14, 2018 · I was having some problem when trying to come out a polar coordinate function with straight line equation. I know it is not good to post images here, but please bear with me …

与equation环境相似的，可以用equation*环境生成不带编号的行间公式。与之相似的还有最常用的无编号行间公式环境 \[...\]，以及现在基本被淘汰的 $$...$$ 环境。当然，还有完全等价 …

May 1, 2025 · The characteristic equation is used to find the eigenvalues of a square matrix A. First: Know that an eigenvector of some square matrix A is a non-zero vector x such that Ax = …

Oct 2, 2011 · If the equations of the diagonals of the rectangle are Ax + By + C = 0 and Dx + Ey + F = 0 then an equation for the rectangle is: M|Ax + By + C| + N|Dx + Ey + F| = 1. M and N can …

To derive the polar coordinates of an ellipse, I believe it is simpler to start from a geometric perspective rather than an algebraic one. If you begin with the equation $$ …

Jul 28, 2010 · Also of note, Wolfram sells a poster that discusses the solvability of polynomial equations, focusing particularly on techniques to solve a quintic (5th degree polynomial) …