Mathematics
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OpenStudy (dtan5457):
Still not getting these rational expressions 100%...
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OpenStudy (dtan5457):
\[(3y^-2+y^3)^-1\]
OpenStudy (dtan5457):
those are all powers
TheSmartOne (thesmartone):
\[(3y^{-2}+y^3)^{-1}\]
TheSmartOne (thesmartone):
Like that?
OpenStudy (dtan5457):
Yes. Idk how to make negative exponents..
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TheSmartOne (thesmartone):
After ^ this you put { and } with the negative inside too
TheSmartOne (thesmartone):
\(\Huge x^{-1}=\frac{1}{x}\)
OpenStudy (dtan5457):
yes, i put it all under the denominator
TheSmartOne (thesmartone):
Just use that and put the rational expression at the denominator and its solved...
OpenStudy (dtan5457):
for some reason, the numerator has a y^2 has the answer..
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OpenStudy (dtan5457):
where does that come from?
TheSmartOne (thesmartone):
must be a typo. :/
OpenStudy (dtan5457):
wow are you serious? stupid barrons book that would be the 2nd typo in the answer and it's only page 42..
TheSmartOne (thesmartone):
|dw:1419745442896:dw|
OpenStudy (dtan5457):
non-like bases, cant add them , forgot
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TheSmartOne (thesmartone):
Hmm. I din't think so. @Nnesha What do you think?
OpenStudy (dtan5457):
the apparent answer is
\[\frac{ y^2 }{ 3+y^5 }\]
OpenStudy (dtan5457):
that's the first answer i got, was sure of it, only to see it's wrong..
OpenStudy (mathmath333):
\(\Huge \checkmark\)
OpenStudy (mathmath333):
\[\frac{ y^2 }{ 3+y^5 }\]