At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
do you mean y = 1/(x+9) ?
sry about that
no problem, so for a problem like this, you need to set the denominator (bottom part) of the fraction to 0, because that's where the function is undefined (you can't divide by zero). x+9=0, so x = -9, so the natural domain is all real numbers except -9. in math notation, this would be (-infinity, -9) U (-9, infinity). the parentheses mean that -9 is not included (brackets would mean that it is included, and the convention is that "we never quite reach infinity"). the U means "union", meaning that the domain is the combination of every value in either set of numbers. let me know if you have any questions.
thank you so much!
i got one more question, anyone there?
hey, i'm still here. what's up?
hey, its just a easy exercise on absolute value
http://www.twiddla.com/499656 there's a whiteboard there, its easier for me to explain