Trapezoidal And Simpson Rule

Question 1

What is the formula for Trapezoidal rule?

Answer 1

h/2 • [f(x₀) + 2f(x₁) + 2f(x₂) + 2(fx₃) + … + f(x_l)]

Where x_l is the last term. Basically the first and last terms aren’t multiplied by 2 while the others are.

h = b-a/2n ; and the intervals are given as b-a/n

Question 2

What is Trapezoidal rule used for?

Answer 2

Either when n = odd or n = even.