differentiate the given expression twice (you may have to use quotient rule)
then equate the result to zero and solve for x
I need some assistance finding what's called a second derivative (I couldn't really understand the prof as he was talking about it), and then solving an equation associated with it.
Equation to solve :
Any help greatly appreciated.
Just take the derivative twice over. Like so:
First thing I'm gonna do is rewrite so I don't have to use that icky quotient rule.
Now we do it again
factoring out he least common factor
Set the thing to equal zero, and solve.
you can take it from here.
This is called the second derivative test. Check this out:
Concavity and the Second Derivative Test - HMC Calculus Tutorial