Tuesday, February 18, 2014

solve the follwing: ln e^3 + ln x^2 = ln (e^5)*x

First, we'll use the product property of the logarithmic
function, for the right side of the equality:


ln (e^5)*x =
ln (e^5) + ln x


Now, we can use the power property of the
logarithmic function:


 ln e^3 = 3* ln e, but ln e =
1


ln e^3 = 3


ln (e^5) = 5* ln
e, but ln e = 1


ln (e^5) =
5


ln x^2 = 2*ln x


We'll
re-write the equation:


3 + 2*ln x = 5 + ln
x


We'll isolate ln x to the
left:


2*ln x - ln x = 5-3


ln x
= 2


x =
e^2

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