Chapter 8, Problem 99RE

Improper integrals by numerical methods Use the Trapezoid Rule (Section 8.8) to approximate ${\displaystyle {\int }_0^R{e}^{-x^2}}$ with R = 2, 4, and 8. For each value of R, take n = 4, 8, 16, and 32, and compare approximations $I={\displaystyle {\int }_0^{\infty }{e}^{-x^2}}dx$.