Thanks for your help plato. Your results is for 2nd derivative right? If indeed it's 2nd derivative can you please double check my answer for first derivative.
Thanks for your help plato. Your results is for 2nd derivative right? If indeed it's 2nd derivative can you please double check my answer for first derivative.
That is not my result; I used a computer algebra system to do it.
I think doing this sort of a problem without a CAS is a pointless exercise!
The first derivative is