Numerical integration Consider He 4-D integral =+(s 1 Seek n-point apploxiwisfions G~2M(外 =1 are the weights and 3ae+e6as(awp巾 Gauss Quadrature: select Hhe"M"sampling points Bind weights so that the rule is exact for tNe polynomial ot nignest or der passible . One-point formula() )=Wf(5s) we neve one wel
and one saMpling point(s, to deter wine. We saaa be able to integrate exadiy a polynowied wilh two Parameters, i.e., a linear'fonchton f. o+a, -(+95-2a Setting I(f=I(f, / We obtain yves tor tue Parameers 2。=W4(a0+a5 6s机:5=0,W=2 cidn gives the"midpoint ru④=2+(o) +() 1