[10000印刷√] 1/x 1 2/x 2=4/x 4 by quadratic formula 192333-1/x 1 2/x 2 4/x 4 by quadratic formula
First, the constant function satisfies the property of being of degree ≤2 Next, it clearly interpolates the given data Therefore by the uniqueness of quadratic interpolation, P2(x) must be the constant function 1 Consider now the data points (x0,mx0),(x1,mx1),(x2,mx2)