1. ## Domain/Range Problem

Me and some of my classmates are stumped on this problem, which asks for the domain and range in interval notation. We are using web-work, an online program where you in-put your answers, and it immediately tells you whether tour answers are right or wrong. So, here's the problem:

17 √x−12

I entered "(0, infinity)" for the Domain and "(-12, infinity)" for the range... both were wrong :/ I got those figures by plugging the equation into my graphing calculator and looking at the graph/number table. That, and the fact that any negative x value would not return a real number.

Any suggestions?

2. Originally Posted by JoeF107
Me and some of my classmates are stumped on this problem, which asks for the domain and range in interval notation. We are using web-work, an online program where you in-put your answers, and it immediately tells you whether tour answers are right or wrong. So, here's the problem:

17 √x−12

I entered "(0, infinity)" for the Domain and "(-12, infinity)" for the range... both were wrong :/ I got those figures by plugging the equation into my graphing calculator and looking at the graph/number table. That, and the fact that any negative x value would not return a real number.

Any suggestions?
I assume it's $\displaystyle f(x) = 17 \sqrt{x - 12}$ ......?

The (maximal) domain is the set of values of x for which the function is defined. The function is only defined for $\displaystyle x - 12 \geq 0$. Therefore ........ Plot a graph to see what the range will be.

3. Thanks for the help, I got it work!