Trapezoidal Rule Calculator for a Function

The calculator will approximate the integral using the trapezoidal rule, with steps shown.

Related calculator: Trapezoidal Rule Calculator for a Table

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Approximate the integral $$$\int\limits_{0}^{1} \left(- 2 x^{2} + x\right)\, dx$$$ with $$$n = 3$$$ using the trapezoidal rule.