equations
Chat with our AI personalities
That sounds like the definition for Recursive Formula.
It is an expression and if it contains an equality sign then it is an equation.
Yes, a mathematical expression can have no variables, but such an expression is usually not very useful. An example of a valid expression without variables is: 1+1=2
multiterm mathematical expression: a mathematical expression consisting of the sum of a number of terms, each of which contains a constant and variables raised to a positive integral power
Any expression that contains one or more variable, such as x; x+2; x+y; x2, etc. Depending on the values of the variables, the expression can also have different values.