在理工科中，Formula, Equation 和 Function 这三个词有什么异同？ - 知乎 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 a particular quantity
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 is x = 0 x = 0 and y = 0 y = 0 This shows you that the z-axis is like an infinitely thin cylinder (with a point cross section 0 radius)
How to solve the Riccatis 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 this differential equation
Polar equation of a circle - Mathematics Stack Exchange A very long time ago in algebra trig class we did polar equation of a circle where r = 2a cos θ + 2b sin θ r = 2 a cos θ + 2 b sin θ Now I forgot how to derive this So I tried using the standard form of a circle
Notation for rounding in equation - Mathematics Stack Exchange There isn't a simple notation for that In the past fifty years or so the notation ⌊x⌋ has become common to mean the greatest integer that is not more than x For example ⌊8 9⌋ = ⌊8 5⌋ = ⌊8 2⌋ = ⌊8⌋ = 8 The result of rounding x to the nearest integer is ⌊x + 1 2⌋