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| require 'bigdecimal' | |
| def integrate (a, b, n) | |
| a = a.to_f; b = b.to_f; n = n.to_i | |
| result = 0.0 | |
| dx = (b - a) / n | |
| dx_half = dx / 2 | |
| for i in 0 ... n | |
| result += yield a + (i * dx) |
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