Question

Unit 2: Apps of Diff. First question 2A-1. I get the answer to be a^(1/2) + b/(2*(a+bx)^(1/2))*x. In the solutions the answer is the same except where the (a+bx) is in my answer, they have only 'a'. Perhaps they explain it on the next line of the solutions but I don't understand it. Can anyone clarify this for me?

Answer 1

oh, evaluate with x0 at 0 haha