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henryrodriguez713Best ResponseYou've already chosen the best response.1
What's your question? haha
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
determine the domain \[f(x)=\sqrt{9x ^{2}}\]
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.1
Do you know what the question is asking for? i.e. do you know what the domain of a function is?
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
the question just says determine the domain of \[f(x)=\sqrt{9x ^{2}}\]
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.1
Yes I know. But do YOU know what it means? What is the "domain"
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
oh lol isnt it a set of functions with all possible inputs from neg to pos or infinite?
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
wouldn't i be breaking down the square root of 9  x squared (3x)(3+x)
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.1
It is all the values of x that you could put into your function to get an output value. So a better question would be to ask yourself what values of x can I put into the function that makes it DNE
 one year ago

henryrodriguez713Best ResponseYou've already chosen the best response.1
dw:1358900569521:dwdw:1358900892255:dw
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.1
DNE is 'does not exist' i.e refers to a part on the functions graph that cannot be determined, because it simply does not exist. :) Basically you need to watch out for square roots, logarithms and denominators equalling zero. In your case, you have a square root, and as @henryrodriguez713 pointed out, you CANNOT have a negative number under the square root.
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
dw:1358901287263:dw
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.1
To get rid of the square root, simply square both sides of the equation.
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
oh since i can't have a negative number, the answer would be false correct? its been 3 years since i've been in school xD
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.1
The function does not exist for x values less than 3 and more than 3
 one year ago

baldymcgee6Best ResponseYou've already chosen the best response.1
dw:1358901513506:dw
 one year ago

henryrodriguez713Best ResponseYou've already chosen the best response.1
Haha. Don't worry if you haven't been in school for three years. All that really matters is that you're learning it. :D
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
dw:1358901727152:dw
 one year ago

zhengcl86Best ResponseYou've already chosen the best response.0
would this be the final product answer?
 one year ago
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