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

High self-esteem helps learning-how do children learn?, High Self-esteem He...

High Self-esteem Helps Learning :  Consider Ajay, a student of Class 2. He is constantly told by his irritated father, "How stupid you are! You don't even understand this! Even yo

Explain basic concepts of parallel lines, Explain Basic Concepts of Paralle...

Explain Basic Concepts of Parallel Lines ? Parallel lines are defined in section 1.2 and we use "//" to denote it. From the definition, we can get the following two consequenc

AREA, How do you find the distributive property any faster?

How do you find the distributive property any faster?

Helping children learn mathematics, Here we have focussed on how mathematic...

Here we have focussed on how mathematics learning can be made meaningful for primary school children. We have done this through examples of how children learn and how we can create

What is the conditional probability based on die questions, A die is rolled...

A die is rolled twice and the sum of the numbers appearing on them is observed to be 7.What is the conditional probability that the number 2 has appeared at least once? A) 1/3

Determine the minimum cost , A company is taking bids on four construction ...

A company is taking bids on four construction jobs. Three Contractors have placed bids on the jobs. Their bids (in thousands of dollars) are given in the file. (A blank indicates n

Student, What is the slope and y intercept for (6,5) (-3,8)

What is the slope and y intercept for (6,5) (-3,8)

Standard hypothesis tests, Standard Hypothesis Tests In principal, we c...

Standard Hypothesis Tests In principal, we can test the significance of any statistic related to any type of probability distribution. Conversely we will be interested in a few

Pythagorean theorem, How do you find the perimeter of an irregular shape us...

How do you find the perimeter of an irregular shape using Pythagorean theorem?

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