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When the integrand has NO simple anti-derivative (like e^{-x²}), the most common numerical method is:
ASubstitution u-method (not applicable)
BSimpson's rule (parabolic approximation)
CLong division (used for polynomials)
DDirect evaluation by inspection always
Answer & Solution
Correct answer: B. Simpson's rule (parabolic approximation)
Integrand without closed-form anti-derivative (like e^(-x²), the bell curve) requires numerical methods. Simpson's 1/3 rule (parabolic, very accurate) is widely used. Trapezoidal rule is simpler but less accurate.
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