Question: A point P is located somewhere on line AD . We desire that the total length L of cables linking P to the points A

A pointPis located somewhere on lineAD. We desire that the total lengthLof cables linkingPto the pointsA,B, andCis minimized (see the figure). ExpressLas a function ofx= |AP|and use the graphs ofLanddL/dxto estimate the minimum value. (Give your answers correct to two decimal places.)

|BD| =1m

|CD| =2m

|AD| =3m

x= m

L= m

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