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Mathematics 7 Online
OpenStudy (anonymous):

nothing

OpenStudy (australopithecus):

Where exactly are you stuck?

OpenStudy (australopithecus):

http://www.wyzant.com/resources/lessons/math/algebra/properties_of_algebra This gives names to most of the rules you need to use

OpenStudy (australopithecus):

Just go through each simplification step by step and write what property you used, but yeah to be honest I dont have much experience describing mathematical manipulations.

OpenStudy (jdoe0001):

hmmm

OpenStudy (jdoe0001):

hmm let's try the 1st one.... what would you get for the numerator on this one \(\bf \large \cfrac{x^{\frac{4}{3}}\cdot x^{\frac{7}{3}} }{x^{\frac{2}{3}}}\quad ?\)

OpenStudy (jdoe0001):

we don't necessarily expect you to be great at it, just to do some footwork

OpenStudy (jdoe0001):

the numerator on the 1st one, should be something you should already know

OpenStudy (jdoe0001):

same base, different exponents

OpenStudy (australopithecus):

I can still try to help you, for the first manipulation \[\frac{x^4}{x^2} = x^4x^{-2}\] "The first step of the simplification involves the elimination of the denominator by writing the exponent as a negative, in order to manipulate the exponents. x^4x^2 = x^(4+2) In the second step The exponents are added together, this can be done because their base are the same. Just drone on like that I suppose?

OpenStudy (australopithecus):

I just was too lazy to write out your problem so I just wrote out a simpler one that is pretty much the same

OpenStudy (australopithecus):

yeah

OpenStudy (australopithecus):

"The first step of the simplification involves the elimination of the denominator by writing the exponent as a negative, in order to manipulate the exponents further."

OpenStudy (australopithecus):

it isnt really hard just go through each step of the manipulation and explain it in words. Expressing the denominators exponent as a negative to bring it up to the numerator, is a way of taking it out of its fractional form.

OpenStudy (jdoe0001):

\(\bf \Large {\cfrac{x^{\frac{4}{3}}\cdot x^{\frac{7}{3}} }{x^{\frac{2}{3}}}\implies \cfrac{x^{\frac{4}{3}+\frac{7}{3}}}{x^{\frac{2}{3}}}\implies \cfrac{x^{\frac{11}{3}}}{x^{\frac{2}{3}}}\\ \quad \\ \cfrac{x^{\frac{11}{3}}}{1}\cdot \cfrac{1}{x^{\frac{2}{3}}}\implies \cfrac{x^{\frac{11}{3}}}{1}\cdot x^{-\frac{2}{3}}\implies x^{\frac{11}{3}}\cdot x^{-\frac{2}{3}}\\ \quad \\ \implies x^{\frac{11}{3}-\frac{2}{3}}}\)

OpenStudy (australopithecus):

No problem :) if you get stuck feel free to ask for further assistance

OpenStudy (jdoe0001):

the 2nd one is very straightforward \(\bf \large \sqrt[5]{x^4\cdot x^5\cdot x^6}\implies \sqrt[5]{x^{4+5+6}}\)

OpenStudy (jdoe0001):

3rd one is \(\bf \large \left(\sqrt[7]{x}\right)^{21}\implies \sqrt[7]{x^{21}}\)

OpenStudy (jdoe0001):

4th one \(\bf \large {x^{\frac{1}{3}}\cdot x^{\frac{2}{3}}\cdot x^{\frac{4}{3}}\cdot \sqrt[3]{x}\\ \quad \\ \textit{keep in mind that }a^{\frac{n}{m}} = \sqrt[m]{a^n}\qquad thus\\ \quad \\ \sqrt[3]{x}\implies x^{\frac{1}{3}}}\)

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