diagram: http://img.photobucket.com/albums/v629/ussjt/math3.jpg A thin equilateral triangular block of the side length 1 unit has its face in the vertical xy-plane with vertex V at the origin. Under the influence of gravity, it will rotate about V until a side hits the x-axis floor (see diagram). Let x denote the inital x-coordinate of the midpoint M of the side opposite V, and let f(x) denote the final x-coordinate of the point. Assume that the block balances when M is directly above V. (a) Determine the domian and range of f (b) Where on the domain is f discontinuous (c) Identify any fixed points of f I have no clue how to go about answering the question. Any help/hints on solving each part would be great, thanks.