A large aluminum ladder was resting vertically against the research shed at midnight, when it began to slide down the side of the shed. A burglar was clinging to the ladders midpoint, holding a pencil flashlight that was visible in the dark. Witness Jill Seymour claimed to see the ladder slide. What did she see? That is, what was the path taken by the bulb of the flashlight? Draw a diagram showing the path. (Devise a physical test to check your visual thinking. You might try sliding a meterstick against a wall, or you might plot points on graph paper.)

L26 - 6 ex. Suppose that f is continuous on (−∞,∞). Given the graph of f (x), ﬁnd the following: 1. Intervals on which...