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

Evaluate infinity limit into the polynomial , Example   Evaluate following...

Example   Evaluate following limits. Solution Here our first thought is probably to just "plug" infinity into the polynomial & "evaluate" every term to finds out the

Rounding, what is the nearest ten thousand of 92,892?

what is the nearest ten thousand of 92,892?

Solution of quadratic equations, Solution of quadratic equations, please pr...

Solution of quadratic equations, please provide me the assignment help for solving the quadratic equations.

Find the discount factors and linear interpolation, Question: All rates...

Question: All rates should be calculated to 3 decimal places in % (e.g. 1.234%), the discount factors to 5 decimal places (e.g. 0.98765), and the bond prices to 3 decimal place

Find the value of x of an arithmetic progressions, Find the value of x if 2...

Find the value of x if 2x + 1, x 2 + x +1, 3 x 2 - 3 x +3 are consecutive terms of an AP. Ans:  a 2 -a 1 =  a 3 -a 2 ⇒   x 2 + x + 1-2 x - 1 = 3x 2 - 3x + 3- x

How much did kara pay in interest, Kara borrowed $3,650 for one year at an ...

Kara borrowed $3,650 for one year at an annual interest rate of 16%. How much did Kara pay in interest? To ?nd out 16% of $3,650, multiply $3,650 through the decimal equivalent

What was his weight within pounds and ounces, Justin weighed 8 lb 12 oz whi...

Justin weighed 8 lb 12 oz while he was born. At his two-week check-up, he had gained 8 ounces. What was his weight within pounds and ounces? There are 16 ounces within a pound.

Which of the subsequent binomials could represent the length, The area of a...

The area of a rectangle is represented through the trinomial: x 2 + x - 12. Which of the subsequent binomials could represent the length and width? Because the formula for the

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