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Function TrapezoidalRule(f As String, a As Double, b As Double, n As Integer) As Double ' Adapted from standard numerical methods VBA textbooks Dim h As Double, sum As Double, i As Integer Dim x As Double h = (b - a) / n sum = (Evaluate(Replace(f, "x", a)) + Evaluate(Replace(f, "x", b))) / 2 Before downloading any PDF, check the author’s website
In the world of engineering, finance, and applied science, the ability to solve complex mathematical problems efficiently is the difference between insight and guesswork. While high-level languages like Python or MATLAB dominate modern discourse, a quiet powerhouse remains installed on over 1.5 billion computers worldwide: Microsoft Excel with VBA (Visual Basic for Applications) . Function TrapezoidalRule(f As String, a As Double, b
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TrapezoidalRule = sum * h End Function
For i = 1 To n - 1 x = a + i * h sum = sum + Evaluate(Replace(f, "x", x)) Next i