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What is the order of accuracy for the method of numerical approximation represented by this diagram?

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What is the order of accuracy for the method of numerical approximation represented by this diagram?

(a) Fourth-order

(b) Third-order

(c) Second-order

(d) First-order

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Correct option is (c) Second-order

Easiest explanation: The given diagram represents the Trapezoidal rule for the approximation of an integral. It uses the values at the starting and the ending of the function. The order of accuracy of the Trapezoidal rule is two.

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