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Mathematics 16 Online
OpenStudy (anonymous):

Represent each fractional exponent as a root.

OpenStudy (anonymous):

\[x ^{\frac{ 1 }{ 4}}\]

OpenStudy (anonymous):

would it just be the fourth root of x

OpenStudy (jack1):

yep

OpenStudy (anonymous):

thank you!

OpenStudy (jack1):

welcome, it was all u hey ;D

OpenStudy (anonymous):

\[n ^{\frac{ 4 }{ 3}}= \sqrt[3]{n}^{4}\] right?

OpenStudy (jack1):

yes, if that's just (n^4) and not whole thing ^4

OpenStudy (anonymous):

yep

OpenStudy (jack1):

cools, then perfect!

OpenStudy (anonymous):

now here is the tough one...

OpenStudy (anonymous):

\[(p ^{\frac{ 7 }{ 4 }})^{\frac{ 1 }{2 }}\]

OpenStudy (jack1):

that's really small on my screen, is that 7/4 and 1/2 ?

OpenStudy (anonymous):

yes it is

OpenStudy (jack1):

cool, so just multiply out the brackets first, then do what you were doing remember the rules: \[x^4 \times x^3 = x^{4+3} = x^7\] but if its \[(x^4)^3 = x^{4 \times 3} = x^{12}\]

OpenStudy (jack1):

so ours is \[(x^{7/4})^{1/2} = x^{7/4 \times 1/2} = x^{7/8}\]

OpenStudy (jack1):

so now that you're rid of the brackets \[x^{7/8} = \sqrt[8]{x^7}\]

OpenStudy (anonymous):

Great! Thanks!!

OpenStudy (jack1):

all good, slaters and gud luk ;D

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