If f(x)=alnx-a3x has a local minimum when x=4 and a does not equal 0, what is a?
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- Why is it negative 1/2? Thank you!
- Sep 05, 2018 at 12:05pm
- Because it is local minimum, if we take +1/2, it would be local maximum.
- Sep 05, 2018 at 12:06pm
- Gotcha. Thank you so much!
- Sep 05, 2018 at 12:07pm
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First find the derivative of f(x) with respect to x. To find the critical points put... View the full answer