You will need
- Knowledge in the field of algebra and mathematical analysis.
The value function is a realm of values which a function can take. For example, the values of the function f(x)=|x| from 0 to infinity. To find the value of the function at a particular point, you need to substitute the argument of a function to its numeric equivalent, the resulting number will be the value ofm functions. Let given the function f(x)=|x| - 10 + 4x. Find the value of the function at the point x=-2. Substitute instead of x the number -2: f(-2)=|-2| - 10 + 4*(-2) = 2 - 10 - 8 = -16. That is, the value of the function at the point -2 -16.
Before looking for the value of the function at the point - make sure it is in the domain of the function.
Similarly, you can find the value of a function of several arguments. The difference is that instead of a single number, you will need to substitute a few - the number of function arguments.