Problem
of
the
Week


PROBLEM 22


POTW22 In the diagram on the right, the lines L1 and L2 are tangent to the graph of
e ax and e -ax, respectively, at the points P1 and P2. The line segments TP1 and TP2 are perpendicular to these tangent lines at P1 and P2.

Find the area of the quadrilateral formed by the origin and the points T, P1, P2. Which value of a > 1 minimizes this area?


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