Most general antiderivative involving sec x
I'm stumped on how to get the most general antiderivative, F(x) , of .
First, I split the equation on addition, since
Then I use the Substitution Rule. sec(x) seems like a good choice for u since it's the inner function of a composition and du will encompass the other x terms
Then I have
However, the answer key says the correct answer is .
Can someone please point out where I've gone wrong here?