r+2. -2

(41) Let g(x) where (a) Find an expression for g(.r). (b) Sketch the graphs of f and g. (c) Where is f continuous? Where is f differentiable? Where is g differentiable? (42) A man standing on a building is watching a bicycle through a telescope as it approaches the building directly below. If the telescope is 310 ft above ground level and if the bicycle is approaching the building at at what rate is the angle, A, of the telescope, changing when the bicycle is 100 ft from the building?