MathDB
Today's calculation of Integral 211

Source: Ochanomizu Women University entrance exam 1969

June 16, 2007
calculusintegrationconicsparabolahyperbolageometrycalculus computations

Problem Statement

When the parabola which has the axis parallel to yy -axis and passes through the origin touch to the rectangular hyperbola xy=1xy=1 in the first quadrant moves, prove that the area of the figure sorrounded by the parabola and the xx-axis is constant.