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Mathematics 15 Online
OpenStudy (anonymous):

Find the domain of the radical function.??

OpenStudy (anonymous):

OpenStudy (anonymous):

do you know how to solve \[9x^2-16\geq 0\] for \(x\)?

OpenStudy (anonymous):

negative

OpenStudy (anonymous):

would you divide by 9?

OpenStudy (anonymous):

no

OpenStudy (anonymous):

\[(3x-4)(3x+4)\geq 0\] is a star t

OpenStudy (anonymous):

the zeros are \(-\frac{4}{3}\) and \(\frac{4}{3}\)

OpenStudy (anonymous):

and since \(9x^2-16\) is a parabola that opens up, it is negative between the zeros and positive outside them so non-negative on \((-\infty, -\frac{4}{3}]\cup [\frac{4}{3},\infty)\)

OpenStudy (anonymous):

ahh i see!! wowsers i feel totally smart lol Than you!!

OpenStudy (anonymous):

Thank*

OpenStudy (anonymous):

how about this one

OpenStudy (anonymous):

OpenStudy (anonymous):

that is a number

OpenStudy (anonymous):

Whats a number?

OpenStudy (anonymous):

\[\left(\sqrt[3]{\frac{54}{4}}\right)^3=\frac{54}{4}\]

OpenStudy (anonymous):

so compute \[\frac{1}{6}\times \frac{54}{4}+5\] to finish

OpenStudy (anonymous):

can i cross multiply

OpenStudy (anonymous):

is it 29/4

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