the natural domain of f

[snakeyy]

i need to find the natural domain of f in this problem f(x) = 3 - x

any help would be appreciated

cheers

 

[pka]

i need to find the natural domain of f in this problem f(x) = 3 - x

any help would be appreciated

What is the largest set of numbers which may be used to evaluate the function?

 

[snakeyy]

real numbers?

 

[pka]

real numbers?

Correct.

 

[Quaid]

ֺֺ
Hi snakyy,

You need to memorize the linear form y=mx+b.

That is, you need to recognize the behavior of f(x) = 3 - x as linear (f's graph is a straight line with slope -1 and y-intercept 3).

You should also know that a line goes forever in each direction. In other words, there is a point on this line for any value of x.

This approach makes answering very easy.

Cheers

ֺֺ

 

[stapel]

real numbers?

This will be the domain for any polynomial function, because you can plug any value in for "x" in a polynomial.