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. …

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 …

Dec 31, 2014 · 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 …

Mar 11, 2018 · In fact, it’s possible to do better and write down an equation of the plane directly. Every other point (x, y, z) (x, y, z) on the plane also generates a linear equation in the …

Apr 15, 2018 · One approach: An equation is a predicate, P(x) P (x), of the form s(x) = t(x) s (x) = t (x) where x x is a free variable (or vector of free variables) and s(x), t(x) s (x), t (x) are terms -- …

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.

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 …

What do Subscripted numbers in an equation mean? Ask Question Asked 13 years, 3 months ago Modified 5 years, 9 months ago

A very long time ago in algebra/trig class we did polar equation of a circle where r = 2a cos θ + 2b sin θ Now I forgot how to derive this. So I tried using the standard form of a circle.

Apr 20, 2017 · Get the equation of a circle through the points $(1,1), (2,4), (5,3) $. I can solve this by simply drawing it, but is there a way of solving it (easily) without having to draw?