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OpenStudy (anonymous):
40/square root5
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OpenStudy (saifoo.khan):
8 root5
OpenStudy (anonymous):
can you show the work please
OpenStudy (saifoo.khan):
sure.
OpenStudy (anonymous):
Any time you have \[1/sqrt(x)\]you can multiply by \[sqrt(x)/sqrt(x)=x\]to get \[(1/sqrt(x))*(sqrt(x)/sqrt(x))=sqrt(x)/x\]In your problem that would leave\[40*sqrt(5)/5=8*sqrt(5)\]
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OpenStudy (anonymous):
sorry \[sqrt(x)/sqrt(x)=1\] not \[x\]
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