Calculus/Engr Math Finding the general soloution:

[DaConfusion]

1. The problem statement, all variables and given/known data
http://img.photobucket.com/albums/v412/daconfusion/question.jpg


2. Relevant equations

The above is the quiz problem which I do not understand. Below is my worked out version on word. I cant figure out how to get that negative value at the end of the problem.

Thank you in advance.

My attempt to solve

http://img.photobucket.com/albums/v412/daconfusion/problem6-1.jpg

[D H]

There is a bit of ambiguity in your question. Does the red tab over answer b mean that you punched b but b is the wrong answer, or b is supposedly the correct answer?

Your worked out answer corresponds to f, none of the above.

[DaConfusion]

Oh yes, sorry. I punched B out of desperation and it was wrong. I could not find the right answer and none of the above is never a choice in this class so I had to guess...

I just re did the quiz a few hours ago and they seem to have fixed that negative sign so I guess it was a typo.

Thank you for your help!

[HallsofIvy]

Yes, your solution is correct. That "-10x" is clearly a typo- which proves that you are better than whoever set the test!