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

Determine does this point lie on the line, Does this Point Lie on The Line?...

Does this Point Lie on The Line? How do you know if a point lies on a given line? For example, does the point (1, 2) lie on the line 3x + y = 7? If you graph the line and the

How many ounces of tomatoes does mark have, Mark has three 4 1/2 oz cans o...

Mark has three 4 1/2 oz cans of tomatoes and ?ve 8 1/4 oz cans. How many ounces of tomatoes does Mark have? Ignore the fractional parts of the mixed numbers at first and mul

Permutation, A telephone dialled is numbered 0to9. if 0is dialled first the...

A telephone dialled is numbered 0to9. if 0is dialled first the caller is connected to the international exchange system.find the number of local calls that can be rung if a local n

Finding absolute extrema, Finding Absolute Extrema : Now it's time to see ...

Finding Absolute Extrema : Now it's time to see our first major application of derivatives.  Specified a continuous function, f(x), on an interval [a,b] we desire to find out the

Differentiate exponential functions, Differentiate following functions. ...

Differentiate following functions. (a)    R ( w) = 4 w - 5 log 9 w (b)   f ( x ) = 3e x + 10x 3 ln x Solution :  (a) It will be the only example which doesn't includ

Unipolar and bipolar boolean inputs, A 4-input Neuron has weights (1,-1,  0...

A 4-input Neuron has weights (1,-1,  0,  0.5.Calculate the network output when the following input vectors are applied. For calculation assume: a. f(net) = unipolar bina

Probability, An unbiased die is tossed twice .Find the probability of getti...

An unbiased die is tossed twice .Find the probability of getting a 4,5,6 on the first toss and a 1,2,3,4 on the second toss

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