Expression的中文是“表达式”。表达式由数和代数组成,比如3, 3x,3x+5a等等。 Equation的中文是"等式",两个表达式用等号连起来,如3x=56+a。等号两边都是表达式。如果目的是根据等式来求未知数的,那么equation叫方程。 Formula是一种特殊等式,比如圆...
虽然formula更侧重于表示一种规则或方法,但在某些上下文中可以视为equation的近义词。 2. **Identity**:在数学上,identity有时指恒等式,即无论变量的值如何变化都成立的等式。此外,identity还可以表示等同或一致的状态,与equation在某些比喻用法上有相似之处。 3. **Expression**:expression在数学中可以指一个...
但需要注意的是,“formula”更侧重于表达一种固定的、可重复使用的计算方法,而“equation”则更强调两边的等价性。 2. **Identity**:在数学上,恒等式(identity)是一种特殊的等式,它在所有可能的变量值下都成立。虽然“identity”在某些上下文中可以替代“equation”,但它通常具有更强的普遍性和必然性。 3. **...
Use vocabulary from previous years and extend to:identity, identically equal, inequality… subject of the formula… common factor, factorise… index law…linear, quadratic, cubic… and the identity sign≡). 1.解释方程,公式和函数的区别.如 (1)在方程5x+4=2x-34中,x是一个特定的未知数; (2)在...
A symbolic expression that represents in an abbreviated form the laboratory observations of a chemical change; an equation (such as 2H2+ O2→ 2H2O) indicates what reactants are consumed (H2and O2) and what products are formed (H2O), the correct formula of each reactant and product, and ...
Simplify the expression. cot x . tan^2 x . csc x.Use identities to solve: If cot \: \theta = \frac 3}\sqrt{3 {5}, find tan\: \theta. Rationalize the denominator.Verify the identity. sin x + cos x + cot x = csc xSimplify the following expression using trigonometric ...
Substituting these values in the formulaa2+b2=c2, beingr=c(the hypotenuse), the result is: x2+y2=r2 (x−A)2+(y−B)2=r2 x2+y2=r2for a circle with center in the origin. (x−A)2+(y−B)2=r2for a circle with a center out of the origin, at a point (A, B). ...
withthisformula,onecouldcalculatedthevolumeofanyspherefromitsradius.Equations Anequationisamathematicalstatementinsymbols,thattwothingsareexactlythesame(orequivalent).Equationsarewrittenwithanequalsign,asin 2+3=5.x(x−1)=x2−x.(x+1)2=x2+2x+1.(equality)(identity)(equation)Mathematical...
Explore conditional equations and how to simplify and then solve them. Compare conditional equations to identity equations and no solution equations.
By continuing to use some elementary operations, Ve can be rewritten as a partitioning matrix with free columns on the left followed by an identity matrix on the right, i.e. (16)Ve=[V1e︸Ne×n1|I︸Ne×n2] where the submatrix V1e corresponding to the primary species, and I correspondi...