Esmy
Solve the formula for the specified variable.



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Esmy
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dw:1348391340127:dw

lambchamps
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i mean \[n=\frac{ IR }{ eIr }\]

Esmy
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You mean

Esmy
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\[n= \frac{ IR }{ Ir  E }\]

Esmy
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because the only option there are this.
n= IR( Ir  E )
n= \[\frac{ R }{ Ir  E }\]
n=\[\frac{ IR }{ Ir + E }\]

Esmy
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and
n= \[\frac{ IR }{ Ir  E }\]

Esmy
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Do I think its the last one like I said

lambchamps
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\[1st: I(nr+R)=n e\]
\[2nd: Inr+IR=n e\]
\[3rd:IR=n eInr\]
\[4th: IR=n(eIr)\]
\[5th: n=\frac{ IR }{ eIr }\]

lambchamps
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then

lambchamps
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\[6th: n=\frac{ IR }{(e+Ir)}\]
\[7th: n=\frac{ IR }{ e+Ir }\]

lambchamps
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the last one is right, though your e is capital

Esmy
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Yeah I thought so thank you so much :)

lambchamps
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thanks for the medal