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...
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...
1.(Mathematics) a mathematical statement that two expressions are equal: it is either anidentityin which the variables can assume any value, or aconditional equationin which the variables have only certain values (roots) 2.the act of regarding as equal; equating ...
An equation is an analytical statement that states that two things are equal. An equation includes either term or expression. In Mathematics, an equation is defined as equality including one or more variables. Solving equations means determining which values of the variables make the equation true....
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 ...
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...
The equation of exchange is an economic identity that shows the relationship between the money supply, thevelocity of money, theprice level, and an index of expenditures. It says that the total amount of money that changes hands in the economy will always equal the total money value of the ...
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 (H2 and O2) and what products are formed (H2O), the correct formula of each reactant and product, and...
1. (Mathematics) a mathematical statement that two expressions are equal: it is either an identity in which the variables can assume any value, or a conditional equation in which the variables have only certain values (roots) 2. the act of regarding as equal; equating 3. the act of making...
An identity equation is true for all the values of the variable. Hence, the solution set of an identity equation is the set of all real numbers. For example, 8x=11-3x Substituting any real number to the value to x will make the equation true. We can denote the solution set of an id...