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Which logarithmic equation is equivalent to the exponential equation below?

e5x = 6

A. ln 5x = 6
B. ln 6 = 5x
C. log 5x = 6
D. log 6 = 5x

User Suellen
by
4.2k points

1 Answer

2 votes

Option B:
\ln 6=5 x is the correct answer.

Step-by-step explanation:

The exponential equation is
e^(5 x)=6

If
f(x)=g(x), then
\ln (f(x))=\ln (g(x))

Thus, the equation becomes


\ln \left(e^(5 x)\right)=\ln (6)

Applying log rule,
\log _(a)\left(x^(b)\right)=b \cdot \log _(a)(x) and thus the equation becomes


5 x \ln (e)=\ln (6)

Since, we know that,
\ln (e)=1, using this we get,


5 x=\ln (6)

Hence, the logarithmic equation which is equivalent to the exponential equation
e^(5 x)=6 is
\ln 6=5 x

Thus, Option B is the correct answer.

User Avshalom
by
3.9k points