Evaluating functions, Mathematics

Assignment Help:

Next we have to talk about evaluating functions.  Evaluating a function is in fact nothing more than asking what its value is for particular values of x. Another way of looking at it is that we are asking what the y value is for a given x is.

Evaluation is actually quite simple.  Let's consider the function we were looking at above

                                                 f( x ) = x2 - 5x + 3

and ask what its value is for x= 4 .  In terms of function notation we will "ask" this using the notation f( 4) .  Thus, while there is something other than the variable within the parenthesis we are actually asking what the value of the function is for that specific quantity.

Now, while we say the value of the function we are actually asking what the value of the equation is for that specific value of x.  Here is f( 4) .

                     f ( 4)= ( 4)2  - 5 ( 4) + 3 = 16 - 20 +3 = -1

Notice that evaluating a function is done in exactly the same way in which we evaluate equations. We plug in for x whatever is on the inside of the parenthesis on the left. Following is another evaluation for this function.

                              f( -6) = ( -6)2  - 5 ( -6) + 3 = 36 + 30 + 3 =69

Thus, again, whatever is on the inside of the parenthesis on the left is plugged in for x in the equation on the right.


Related Discussions:- Evaluating functions

Operation research, approximate the following problem as a mixed integer pr...

approximate the following problem as a mixed integer program. maximize z=e-x1+x1+(x2+1)2 subject to x12+x2 =0

Graphical method for interpolation, Graphical Method Whil...

Graphical Method While drawing the graph on a natural scale, the independent variables are marked along the horizontal line and corresponding dependen

Toni tiger, Application Practice Answer the following questions. Use Equat...

Application Practice Answer the following questions. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Sav

#i need help on my math homework its on algabraitle.., The question is: If ...

The question is: If 0.2 x n = 1.4,what is the value of n.

Explain english system in details, Explain English System in details? T...

Explain English System in details? There are three types of measurements that can be taken using the English System: length, distance, weight, and capacity. Length and dista

Find third order partial derivatives, Question: Find all third order pa...

Question: Find all third order partial derivatives for the function   F(x,y)= log xy+ e (x+y) -x/y.

The hundredths digit is 4 and the tenths digit is twice, Which number below...

Which number below is described by the following statements? The hundredths digit is 4 and the tenths digit is twice the thousandths digit. a. 0.643 b. 0.0844 c. 0.446 d. 0.0142

Quadratic equation, can anyone explain me the concept of quadratic equation...

can anyone explain me the concept of quadratic equation?

Fractions rates and ratios, In 6th grade I am learning about ratios rates a...

In 6th grade I am learning about ratios rates and fractions. I am working on vmathlive.com and need serious.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd