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View Full Version : natural log fxn = negative integral?


Jules18
Nov23-09, 07:29 PM
1. The problem statement, all variables and given/known data
True or false?

ln(1/10) = -\int dx/x

3. The attempt at a solution

I have no idea where to start on this one.

what is dx/x ??

jakncoke
Nov23-09, 07:43 PM
right side means that u are supposed to integrate with respect to x

-Integrate[1/x] with respect to x

Mark44
Nov23-09, 08:24 PM
This is obviously not true as posted. Are there limits of integration that we're not seeing?
I.e., does the integral look like this?
-\int_1^{10} \frac{dx}{x}

Jules18
Dec18-09, 01:38 AM
ok I get it. the limits are missing, it must be a typo, but otherwise this makes sense to me now thanks