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- What is the difference between equation and formula?
An equation is any expression with an equals sign, so your example is by definition an equation Equations appear frequently in mathematics because mathematicians love to use equal signs A formula is a set of instructions for creating a desired result Non-mathematical examples include such things as chemical formulas (two H and one O make H2O), or the formula for Coca-Cola (which is just a
- 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
The equation of an object is a way of telling whether a point is part of an object -- if you substitute the coordinates of the point into the equation and the equation is true, then the point is on the object; if the equation is not true for that point, then the point is not on the object
- Notation for rounding in equation - Mathematics Stack Exchange
I'm wondering if there is a symbol or notation for Round to the nearest 10th For example, the area of a circle with a radius of 45 feet, rounded to the nearest square foot, could be written as, A =
- 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
- What is the difference between an identity, an equation and a . . .
Equation means equality They are both related to the word equal If such an equality is true for all values of the variable, it is called an identity, e g , sin2x+cos2x= 1 sin 2 x + cos 2 x = 1 is true for all x If however the equation in question only holds for some values, which one is supposed to determine, then it's called conditional, and its variable is termed an unknown
- Ellipse in polar coordinates - Mathematics Stack Exchange
If instead we center at the right focus and follow the same steps, we obtain $$ r=\frac {a (1-\epsilon^2)} {1+\epsilon\cos\theta} $$ This geometric approach also extends naturally to hyperbolas and parabolas Its main advantage is that it avoids solving a complicated quadratic equation I hope this helps!
- 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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