% function accepts 1 double and 2 vectors of double 
%		a612(#num_of_points, vector_a, vector_b)
% number of datapoints in both vectors must be equal, 
% or else the result will not be correct
%
%exp.:
%	a=[0, 5, 10, 15, 20 ]
%	b=[1, 0.8811, 0.7366, 0.5430, 0.1698]
%	a612(5,a,b)
%   ans= -0.023780  -0.026340  -0.033810  -0.019360  -0.074640