Answer / skc

A large capacitor is switching ON and OFF will change the pf with a large factor of variation. but in the case of small capacitors accuracy can be maintained by ON and OFF of many capacitors.

Given a collection of points P in the plane, a 1-set is a point in P that can be separated from the rest by a line; i.e. the point lies on one side of the line while the others lie on the other side. The number of 1-sets of P is denoted by n1(P). The maximum value of n1(P) over all configurations P of 19 points in the plane is 18

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