.For the trapezoidal rule, expresspi(x) as
f(xi) + (x−xi)
f(xi+1) −f(xi)
xi+1 −xi
.
Expandfin Taylor series aboutxiand evaluate this atx=xi+1. Use the resulting expression in order to prove (5.14).
.Following the approach in (5.8)–(5.11), deriveAijforj= 0,1,2 for Simpson’s rule.
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