ajmill1978

I need to implicitly differentiate: sin(xy) = x^4 - y^5 with respect to x. I get dy/dx = 4x^3/[y*cos(xy) +5y^4]. He says this is wrong. I'm not sure where I went wrong after differenting both sides with respect to x and then solving for the dy/dx's that came up via chain rule.

I've played a game through, from scratch 3 times. Every time I get into the ghost ship, there is a puzzle involving 5 levers that must be pulled in the order of 24513. Except that this order doesn't work. Each time I've played, I've saved the game and tried something different. I've tried reading the stone with the clue (and not reading the stone). I've tried hitting the ball switch to turn on the reaper (and not). No matter what, the puzzle fails. It's a fairly straightforward puzzle and all the faq's agree with what I'm doing...