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- 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 Your example is a formula for mpg But it can become an equation if mpg and one of the other value is given and the remaining value is sought
- What is the equation for a 3D line? - Mathematics Stack Exchange
I love your answer for a line equation in the form of z = f (x, y) Unfortunately calculating square roots can be impractical from the calculational standpoint and hence I really doubt any plotting software will be able to graph it correctly
- 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)
- What exactly is an equation? - Mathematics Stack Exchange
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 What you do with that information depends on the context
- geometry - Get the equation of a circle when given 3 points . . .
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?
- Equation of a rectangle - Mathematics Stack Exchange
I need to graph a rectangle on the Cartesian coordinate system Is there an equation for a rectangle? I can't find it anywhere
- Transformations of the circle equation - Mathematics Stack Exchange
I know to translate the circle equation we just need to change the values in the brackets of the general circle equation (x −x1)2 + (y −y1)2 =r2 (x x 1) 2 + (y y 1) 2 = r 2 , and in order to dilate a circle we need to double the value of the radius i e times by 22 2 2, however when it came to stretching and squeezing, I am confused if there
- 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性质，相关证明较为繁琐，可查看相关专著，如：《数学物理方法》—吴崇试等； 《数学物理方法》— 顾樵
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