Differentiation - Method Based on Interpolation (Lagrange's Method)

x x0 = 3 x1 = 4 x2 = 5
f(x) f0 = 90 f1 = 261 f2 = 631
Find f'(3.5)
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x x0 = 2 x1 = 3 x2 = 4
f(x) f0 = 25 f1 = 87 f2 = 265
Find f'(2.5)
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