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Mathematics 16 Online
OpenStudy (anonymous):

How would i answer this? Link Below.

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

\[\Huge \frac{1}{x^{{}^{\frac{-3}{6}}}}\]

jimthompson5910 (jim_thompson5910):

First reduce -3/6 to get -1/2 \[\Huge \frac{1}{x^{{}^{\frac{-3}{6}}}}=\frac{1}{x^{{}^{-\frac{1}{2}}}}\]

jimthompson5910 (jim_thompson5910):

Then use the rule \[\LARGE \frac{1}{x^{-k}} = x^k\] to get \[\Huge \frac{1}{x^{{}^{\frac{-1}{2}}}} = x^{{}^{\frac{1}{2}}}\] are you with me so far?

OpenStudy (anonymous):

@jim_thompson5910 if I'm being honest with you, I'm totally lost. All of the signs are really confusing:(

jimthompson5910 (jim_thompson5910):

do you see how I reduced -3/6 to get -1/2 ??

OpenStudy (anonymous):

oh okay, i understand that... sorry @jim_thompson5910

jimthompson5910 (jim_thompson5910):

that's ok

jimthompson5910 (jim_thompson5910):

have you seen this rule at all before? \[\LARGE \frac{1}{x^{-k}} = x^k\]

OpenStudy (anonymous):

no:/

jimthompson5910 (jim_thompson5910):

Basically negative exponents mean we take the reciprocal of the base to get the exponent to be positive Examples: \[\LARGE \frac{1}{x^{-2}} = x^2\] \[\LARGE x^{-3} = \frac{1}{x^{3}}\] notice how the x flips to 1/x or vice versa

jimthompson5910 (jim_thompson5910):

here is another page that has a lesson on negative exponents if you want more practice http://www.purplemath.com/modules/exponent2.htm

OpenStudy (anonymous):

so then you would have |dw:1445303088962:dw|

jimthompson5910 (jim_thompson5910):

after reducing the -3/6 to -1/2, yes

jimthompson5910 (jim_thompson5910):

|dw:1445303203798:dw|

jimthompson5910 (jim_thompson5910):

now we can take the reciprocal of the 1/x to get x/1 which is just x taking the reciprocal changes the negative 1/2 into positive 1/2 |dw:1445303272657:dw|

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