I need some help on a quotient derivative:
Here is what I have so far:
1.
2.
I know my algebra must be wrong because I'm coming up with a totally different answer than the book. Could someone please help give me a play by play?
Thanks
-db
I didn't, that was just a guess based on rationalising the denominator. Turned out to be wrong.
Note that
Note that in the numerator there is a factor of
Because we can put that on the denominator. Also cancels in the numerator
Lastly 2 cancels to give the book's answer of