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Mathematics 21 Online
OpenStudy (anonymous):

What is the range og the function f(x)=-2 sqrt(x-3)-4?

OpenStudy (anonymous):

I believe it is f(x)<=-4

OpenStudy (anonymous):

this is\[ f(x)=-2 \sqrt{(x-3)}-4\]?

OpenStudy (anonymous):

my bad umm i was thinking domain

OpenStudy (anonymous):

Yep thats right @RaphaelFilgueiras =) Its all good @Outkast3r09

OpenStudy (anonymous):

if the first part = 0 you get -4

OpenStudy (anonymous):

however as x goes to infinity for the sq rt it goest to infiniyt also

OpenStudy (anonymous):

mutliply -2 (infty) you simply get -infty so it's -infty,-4

OpenStudy (anonymous):

Therfore it should be all real numbers? @Outkast3r09

OpenStudy (anonymous):

no because the root cannot be negative so you'll never get a positive number

OpenStudy (anonymous):

f(x)<=-4,since sqrt>=0

OpenStudy (anonymous):

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