Consider the double-jointed robotic arm shown in the
Chapter 9, Problem 67(choose chapter or problem)
Consider the double-jointed robotic arm shown in the figure. Let the lower arm be modeled by a = 82, 3, 49, the middle arm be modeled by b = 81, -1, 39 , and the upper arm by c = 84, -1, -29, where units are in feet
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