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

Additionally functions in substitution rule, Substitution Rule Mostly ...

Substitution Rule Mostly integrals are fairly simple and most of the substitutions are quite simple. The problems arise in correctly getting the integral set up for the substi

Marketing orientation, what marketing orientation is kelloggs influenced by...

what marketing orientation is kelloggs influenced by?why do you think kelloggs use this approach?

Solving trig equations, Solving Trig Equations : Here we will discuss on s...

Solving Trig Equations : Here we will discuss on solving trig equations. It is something which you will be asked to do on a fairly regular basis in my class. Let's just see the

Solve the differential equation, Solve the subsequent differential equation...

Solve the subsequent differential equation and find out the interval of validity for the solution. Let's start things off along with a fairly simple illustration so we can notic

Permuttation, A telephoned dialled number 0 to 9.if 0 is dialled first the ...

A telephoned dialled number 0 to 9.if 0 is dialled first the caller is connected to the international exchange system.find the number of local calls that can be rung if a local num

Conversion\, how many mg are there in g?

how many mg are there in g?

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