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A^B=C^D

Find D

 Jan 25, 2017

Best Answer 

 #2
avatar+26388 
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A^B=C^D

Find D

 

\(\begin{array}{|rcll|} \hline C^D &=& A^B \quad &| \quad \ln() \text{ both sides }\\ \ln(C^D) &=& \ln(A^B) \quad &| \quad \ln(a^b) = b\cdot \ln(a) \\ D\cdot \ln(C) &=& B\cdot ln(A) \quad &| \quad :\ln(C) \\ \mathbf{D} & \mathbf{=} & \mathbf{B\cdot \frac{ln(A)}{ln(C)}} \\ \hline \end{array}\)

 

laugh

 Jan 25, 2017
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ln(a*b)/ln(c)

 Jan 25, 2017
 #2
avatar+26388 
+65
Best Answer

A^B=C^D

Find D

 

\(\begin{array}{|rcll|} \hline C^D &=& A^B \quad &| \quad \ln() \text{ both sides }\\ \ln(C^D) &=& \ln(A^B) \quad &| \quad \ln(a^b) = b\cdot \ln(a) \\ D\cdot \ln(C) &=& B\cdot ln(A) \quad &| \quad :\ln(C) \\ \mathbf{D} & \mathbf{=} & \mathbf{B\cdot \frac{ln(A)}{ln(C)}} \\ \hline \end{array}\)

 

laugh

heureka Jan 25, 2017

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