5x 7+4x 6+2x 9+ 18+5 = 100 .
Identity, a mathematical concept, is an equation that holds no matter how the variables are taken. The range of identity is the common part of the definition range of left and right functions, but two independent functions have their own definition ranges, which are different from X identity in non-negative real number set and X identity in real number set.
An identity has many variables, and there is also one variable. If there is only one variable on both sides of an identity, are there two identities? Analyze the relationship between expressions. It comes from e ix = cosx+isinx (triangular representation of complex numbers), if x=π, e π I+ 1 = 0.
What is the relationship between "functional equality" and "identity"? Can Functional Equality be Derived from Identity?
Mathematically, an identity is an equation that holds no matter what value a variable takes in a given range. An identity has multiple variables and one variable. If there is only one variable on both sides of the identity, then the identity is the relationship between two analytical expressions. Given two analytic expressions, if any number of the common parts (or subsets of the common parts) of their domains or the values of arrays are equal (see function), the two analytic expressions are said to be the same.