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anonymous
 5 years ago
relative rate of change for f(x)= 5x  xlnx
anonymous
 5 years ago
relative rate of change for f(x)= 5x  xlnx

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Same deal as before. From the definition,\[\frac{f'(x)}{f(x)}=\frac{5(\ln x+1)}{5xx \ln x}=\frac{4\ln x}{x(5\ln x)}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Are you having trouble with taking the derivative?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yeah i wasnt sure how to get the derivative.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0jsut when you have ln

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'm thinking it's the xlnx bit?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[\frac{d}{dx}x \ln x=x \frac{d}{dx}\ln x+\ln x \frac{d}{dx}x=x \times \frac{1}{x}+\ln x \times 1\]\[=1+\ln x\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So the entire derivative in the numerator is\[f'(x)=5(1+\ln x)=4\ln x\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0im trying to correct this test and this class is killing me

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0we'll do our best to help
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