Comprehensive Interpretation of a Three-Point Gauss Quadrature with Variable Sampling Points and Its Application to Integration for Discrete Data

Table 4

𝑎−2	𝑎−1	𝑎0	𝑎1	𝑎2
−1/90	34/90	114/90	34/90	−1/90
−0.011111111	0.37777778	1.2666667	0.37777778	−0.011111111