Related Questions

 Tags

Question by  TwiztedK (14)

# How do you evaluate math functions?

I'm not very good at math.

 +1 vote! +7 you voted Answer by  DaG68 (13) Each function has a definition that tells what to do with the argument of the function (x, say) to get its value (y, say). For instance, the function f(x) = x + 20 says "take x, sum 20 to it, and the result is function f applied to x".

 +1 vote! +7 you voted Answer by  bricen (77) If your equation has parentheses, first perform the math inside and work your way out. Multiply and Divide numbers before Adding and Subtracting.

 +1 vote! +7 you voted Answer by  VB (361) To evaluate a math function (f(x) = some stuff including x) at a particular value, say 2. Then everywhere that an x shows up, replace it with a 2. Then perform the operations on the right to come up with a number. Result is the answer. Example: f(x)=x^2+x-1, f(2)=2^2+2-1=5

 +1 vote! +6 you voted Answer by  john11 (617) take a function y = f(x) where x takes on a set of values. Let these numbers be whole numbers (1,2,3,4,5,6,7) for simplicity. What y = f(x) means is that y equals some transformations to those whole numbers. If we let y = x + 2, then {x=1,y=3;x=2,y=4;x=3;y=5} for instance.

 +1 vote! +6 you voted Answer by  VB (361) Given a function f(x) = whatever, to evaluate it you need to but in the number(expression) into every single x place. Example: f(x) = x^2 - x +1 f(2) = [2]^2-[2]+1 = 3 f(7) = [7]^2-[7]+1 = 43 f(&) = [&]^2-[&]+1

 +1 vote! +6 you voted Answer by  LuptonsavedbyJesusyahoocom (32) Evaluating a function means to plug in a value for the independent variable or variables and then calculating the value of the function with those value(s).

 +1 vote! +5 you voted Answer by  njanetos (69) A math function is simply an association between objects. An example is a function which associates each number with a number one higher. This would be written as f(x) = x+1. Then given some number, like 2, you add 1, and so this function associates 3 with 2.

 +1 vote! +5 you voted Answer by  Andrew69bc (18) to evaluate math functions, plug in the number to be evaluated into the function. for example, to evaluate F(x) = x-2; at x=3, plug 3 into the function for x: F(3) = 3 - 2 F(3) = 1

 +1 vote! +2 you voted Answer by  unni (259) My subject is maths. And also i got 75% at my degree. In my opinion it is a powerful subject, because our day to day life is connected with math subject. For example, in our office, bank, etc. So we can evaluate math function is very common to our life