Trapezoidal Rule

• Integral of f(x) from a to b can be approximated by

• H/2 * [F(X_0) + 2F(X_1) + 2F(X_2) + … + 2F(X_N-1) + F(X_N)]

• where n is the number of evenly spaced subintervals

• and H=(b-a)/n

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