If you are talking about a function in a variable (lets say f(x)=1/x) then it probably means that as x gets bigger and bigger, the function f(x) starts to settle around a certain number, ie: f(x) is the same for two really big numbers that are different. With f(x)=1/x we have f(1000000)=1/1000000=0.000001 and f(2000000)=1/2000000=0.0000005 Which are both VERY, VERY close to 0. SO in this example the expression (f(x)=1/x) is approaching a given value of 0.
substitution
The answer will depend on the expression - which is not given!
The value that results from the substitution of a given input into an expression or function is the output. The value substituted into an expression or function is an input.
The value of the expression 73 is simply 73. In mathematics, an expression is a combination of numbers, symbols, and operators that represents a mathematical statement. In this case, the expression is just the number 73 itself, so its value remains 73.
When a given set of values for the variables are substituted in the expression the result is the value of the expression.
If the value of a function cannot be determined for any value of the independent variable, then, the value the function seems to be approaching would be its limiting value for that particular value of the independent variable.
Since there is no expression given, there is no sensible answer.
Is the value obtained when all the variables have been given their value and the expression has been calculated according to mathematical rules.
It would help if the expression was given!
The range is the maximum value in a given data minus its minimum value
If you replace variables in an expression by numbers (in case there are any variables) and then do the indicated operations, you get a number. That final number is the "value" of the expression.
That will depend entirely on the algebraic expression which has not been given.