Evaluating a function, Mathematics

Assignment Help:

Evaluating a Function

You evaluate a function by "plugging in a number".

For example, to evaluate the function
f(x) = 3x2+ x -5
at x = 10, you plug in a 10 everywhere you see an x:
f(10) = 3(10)2 + 10 - 5
=3(100) + 10 - 5
=300 + 10 - 5
=305

To evaluate f at x = z + 1, you would write

f(z + 1)= 3(z + 1) 2 + (z + 1) - 5
The thing to be careful of is parentheses. Notice how in the first term, the entire expression (z + 1) is squared? If you wrote

f(z + 1) = 3z + 1 + (z + 1) - 5 (wrong!)

it would be wrong. You need the whole expression squared and multiplied by 3, and the parentheses are needed to make it happen!

 

 


Related Discussions:- Evaluating a function

Show that af+bd+ce=ae+bf+cd= 1/2 , In figure, the incircle of triangle ABC...

In figure, the incircle of triangle ABC touches the sides BC, CA, and AB at D, E, and F respectively. Show that AF+BD+CE=AE+BF+CD= 1/2   (perimeter of triangle ABC), Ans:

Show that the height h of the tower, The angle of elevation of the to...

The angle of elevation of the top of a tower from a point on the same level as the foot of the tower is α. On advancing 'p' meters towards the foot of the tower, the angle of eleva

Modi method, why modi method is used in operation research

why modi method is used in operation research

Pde, i find paper that has sam my homework which i need it, in you website...

i find paper that has sam my homework which i need it, in you website , is that mean you have already the solution of that ?

Determine how much more time it will take to reach the base, A man on a top...

A man on a top of a tower observes a truck at an angle of depression α where tanα = 1/√5 and sees that it is moving  towards the base of the tower. Ten minutes later, the angle of

The Bake Sale, Lindy has 48 chocolate chip cookies and 64 vanilla wafer coo...

Lindy has 48 chocolate chip cookies and 64 vanilla wafer cookies. How many bags can Lindy fill if she puts the chocolate chip cookies and the vanilla wafers in the same bag? She pl

How many types of integer operatiions explain, How many types of Integer Op...

How many types of Integer Operatiions explain? Adding Integers The rules for adding integers are: 1. A positive number plus a positive number equals the sum of the two pos

Times fractons, In a garden, 1/8 of the flowers are tulips. 1/4 of the tuli...

In a garden, 1/8 of the flowers are tulips. 1/4 of the tulips are red. What fraction of the flowers in the garden are red tulips?

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