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anonymous
 5 years ago
how to calculate the natural domain of 1/x+9 ?
anonymous
 5 years ago
how to calculate the natural domain of 1/x+9 ?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0do you mean y = 1/(x+9) ?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no 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.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i got one more question, anyone there?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0hey, i'm still here. what's up?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0hey, its just a easy exercise on absolute value

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0http://www.twiddla.com/499656 there's a whiteboard there, its easier for me to explain
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